160 Email Subject Line Examples for Marketing, Sales, and Business

Introduction

Mailchimp recommends using no more than nine words and 60 characters in an email subject line, with no more than three punctuation marks and one emoji. These recommendations are based on Mailchimp’s analysis of open-rate performance; they are not universal requirements or guarantees of campaign results.

For business owners and marketers, the priority is to make the email’s purpose clear. A promotion should describe a real offer, a project update should identify the work, and a transactional email should accurately describe the event that occurred.

This guide contains 160 email subject line examples across marketing, ecommerce, professional communication, newsletters, events, onboarding, follow-ups, transactional notices, and re-engagement. It also explains how to improve subject lines, pair them with preview text, test alternatives, and follow relevant sender requirements.

The examples were written for this guide and have not been independently performance-tested.

Table of Contents

1. Best Email Subject Lines
2. Promotional and Seasonal Email Subject Lines
3. Ecommerce and Retargeting Email Subject Lines
4. Personalized Email Subject Lines
5. Professional, Sales, and Cold Email Subject Lines
6. Attention-Grabbing Email Subject Lines
7. Newsletter, Event, Survey, and Thank-You Subject Lines
8. Welcome and Onboarding Email Subject Lines
9. Follow-Up and Transactional Email Subject Lines
10. Re-Engagement Email Subject Lines
11. Weak vs. Better Email Subject Lines
12. How to Write Better Email Subject Lines
13. How to Test Email Subject Lines
14. Email Subject Line Checklist
15. Email Deliverability and Compliance
16. Frequently Asked Questions
17. Conclusion
18. References

1. Best Email Subject Lines

These examples cover business updates, research, planning, and educational content.

1. Your Monthly Marketing Performance Report
2. What to Check Before You Buy
3. Five Ideas for Your Next Business Project
4. How to Organize Your Next Workweek
5. A Guide to Customer Research
6. What’s Changing in [Industry] This Month?
7. Your Business Performance Summary for [Month]
8. Resources for Your Next [Project Name]
9. A Step-by-Step Guide to [Task]
10. Questions to Answer Before Your Next Launch
11. [Industry] Research Digest: [Month] Edition
12. How to Evaluate a Software Vendor
13. A Checklist for Your Next Campaign
14. What Your Latest Results Reveal
15. Your Next Three Steps for [Project Name]
16. Decisions to Make Before the Next Planning Meeting

“Your Monthly Marketing Performance Report” fits an email containing campaign metrics and recommendations. If the message merely announces a service, the subject creates the wrong expectation.

“Questions to Answer Before Your Next Launch” suits an educational checklist. Readers should find specific questions and actionable guidance in the email.

2. Promotional and Seasonal Email Subject Lines

Promotional subjects should identify the offer or product benefit. Seasonal subjects should relate to a real occasion or shopping need.

17. Save 15% on Your Next Order
18. Your Weekend Offer: [Discount]
19. Explore Our New [Product Collection]
20. Spring Cleaning Essentials for Your Home
21. Shop [Product Category] for Your Home
22. This Month’s Offers on [Category]
23. Free Shipping on Eligible Orders
24. Your Holiday Gift Guide Is Here
25. Selected [Products] at Lower Prices
26. Black Friday Offers Begin [Date]
27. Last Day to Order for [Delivery Date]
28. Gifts for Every Budget
29. Meet the New [Product Name]
30. Build a Bundle With [Product Category]
31. Compare Our Current Plans and Packages
32. Your [Season] Shopping List, Organized

“Last Day to Order for [Delivery Date]” communicates a shipping cutoff. The date must represent a real deadline, and delivery conditions should be explained in the message.

“Black Friday Offers Begin [Date]” suits a scheduled campaign. Update the subject after the date passes so that an expired promotion is not presented as current.

3. Ecommerce and Retargeting Email Subject Lines

These examples support product discovery, comparison, cart reminders, and customer questions. Use them when the recipient’s relationship with the product or store justifies the message.

33. Still Considering [Product Name]?
34. What to Know Before Choosing [Product Category]
35. Your Saved Items: [Number] Products to Revisit
36. Questions About [Product Name]?
37. Which [Product] Fits Your Requirements?
38. The Specifications You Asked About
39. Your Shopping Cart Contains [Product Name]
40. Check the Delivery Options for [Product Category]
41. Revisit Your [Product Category] Shortlist
42. Find the Right Size or Fit
43. Need Help Choosing a Plan?
44. Compare the Features of [Product A] and [Product B]
45. Continue Your [Application or Setup]
46. What the Warranty Covers for [Product Name]
47. Delivery and Returns: What to Know
48. Explore Alternatives in [Product Category]

“Your Shopping Cart Contains [Product Name]” identifies an unfinished shopping action. Send it only when the store has reliable cart information and the recipient is eligible to receive the email.

“Compare the Features of [Product A] and [Product B]” promises a comparison. The body should explain meaningful differences rather than repeat generic sales copy.

“Check the Delivery Options for [Product Category]” is relevant when shipping costs or timing matter to the buyer. Include the information the subject promises.

4. Personalized Email Subject Lines

Personalization adds context when the information is accurate and relevant. Names, roles, projects, and declared interests can make a message more specific.

49. [First Name], Your Weekly Marketing Report
50. New [Topic] Resources for Your Team
51. Your Guide to [Declared Interest]
52. [First Name], Your [Project] Status at a Glance
53. A Briefing for [Industry] Professionals
54. Ideas for Your [Project Type]
55. Your [Month] Account Summary
56. Your [Product Name] Setup Guide
57. A New [Topic] Guide for [Job Role]
58. [First Name], Updates on [Topic]
59. Your [Product Name] Delivery Update for [Date]
60. [First Name], Your [Service Name] Renewal Date Is [Date]
61. An Executive Briefing on [Industry Topic]
62. Your [Service Name] Account Overview
63. What’s New in [Declared Interest]?
64. Recommendations for Your [Business Goal]

“Your [Product Name] Delivery Update for [Date]” should use verified order information. An inaccurate date can confuse customers and increase support requests.

“[First Name], Your [Project] Status at a Glance” fits a real project relationship. It is less suitable for a generic newsletter because it implies a specific project the recipient recognizes.

Handling a missing first name

Mailchimp supports default values for merge tags. Its documentation gives “Friend” as an example of a default first-name value. A configured default replaces missing name data; it does not automatically remove the surrounding wording.

Test the actual merge-tag syntax and preview the rendered email in your chosen platform. Do not assume conditional subject-line expressions are supported unless the platform documents them.

Source: Mailchimp — Getting Started With Merge Tags.

5. Professional, Sales, and Cold Email Subject Lines

Professional subjects should identify the project, requested action, or business issue. Cold outreach needs a relevant reason for contacting the recipient without suggesting a relationship that does not exist.

65. Project Update: [Project Name]
66. Meeting Request: [Specific Topic]
67. Review Requested: [Document Name]
68. Proposal: [Project or Service]
69. Revised Timeline for [Project Name]
70. Feedback Requested on [Draft]
71. Who Does What Next on [Project Name]?
72. Meeting Notes and Assigned Actions
73. A Question About [Company]’s [Business Challenge]
74. An Idea for Improving [Specific Process]
75. Website Automation for [Company Name]
76. Reducing Manual Work in [Department]
77. Your Requested Estimate for [Service]
78. Can We Discuss [Specific Business Objective]?
79. Next Steps for [Client Project]
80. An Introduction to [Service or Solution]

“An Idea for Improving [Company]’s [Business Challenge]” can be effective in cold outreach when the sender has researched the business and can offer a relevant idea. Generic personalization weakens the message.

“Review Requested: [Document Name]” suits an existing work relationship where the recipient is expected to review a document. In a first-contact email, it can imply an agreement that never happened.

Cold outreach should be transparent about its purpose. A subject that implies a referral, meeting, or previous conversation that never occurred can damage trust.

6. Attention-Grabbing Email Subject Lines

Curiosity can make a subject more specific by raising a question or identifying a problem. The email must deliver the promised explanation.

81. The Reporting Mistake That Hides Campaign Results
82. What First-Time Buyers Often Miss About [Product]
83. How to Document Campaign Tracking Changes
84. One Change to Test in Your Next Email
85. Is Your [Process] Missing This Check?
86. Three Questions to Ask Before Investing in [Tool]
87. What Changes When You Automate [Task]?
88. A Common [Industry] Problem—and How to Assess It
89. Three Checks Before You Publish
90. Busy or Productive? Measure the Difference
91. One Better Question to Ask Your Customers
92. A Pre-Send Review of Audience, Links, and Timing
93. Where an Unclear Workflow Creates Extra Work
94. A Different Approach to [Business Problem]
95. Measure [Metric] Before Changing Your Strategy
96. When to Compare Results Across Campaigns

“The Reporting Mistake That Hides Campaign Results” suits an email that explains a specific measurement problem. A general list of marketing tips would not fulfil the promise.

“A Pre-Send Review of Audience, Links, and Timing” makes the scope of the email clear. It works best when the body provides a review process that readers can follow.

Curiosity should lead to a real answer. Avoid withholding the basic purpose of a message merely to encourage opens.

7. Newsletter, Event, Survey, and Thank-You Subject Lines

Newsletters summarize information, event emails invite or inform attendees, surveys request feedback, and thank-you messages acknowledge a real action.

97. This Week in Marketing: [Three Main Topics]
98. The [Month] Business Briefing
99. Five Reads for Your Weekend
100. [Industry] Trends to Watch This Month
101. What the Latest [Industry] Data Shows
102. This Month’s [Industry] Resource Guide
103. What’s New in AI and Automation?
104. The [Day] Industry News Roundup
105. Ideas for Next Week’s Planning Meeting
106. What Our Team Is Reading About [Topic]
107. [Month]’s Tools and Resources
108. Join Us for [Event Name] on [Date]
109. Your Registration Details for [Event Name]
110. Please Share Your Feedback on [Experience]
111. Thank You for Attending [Event Name]
112. [Newsletter Name]: [Edition Topic]

“Join Us for [Event Name] on [Date]” is an invitation for a future event. “Your Registration Details for [Event Name]” is for people whose registration has been recorded.

“Please Share Your Feedback on [Experience]” is most relevant after the recipient has actually experienced the product, event, or service. Otherwise, the request may produce irrelevant feedback.

“Thank You for Attending [Event Name]” acknowledges attendance and can introduce follow-up resources. If someone registered but did not attend, choose wording that reflects their actual status.

A recurring newsletter benefits from a recognizable name and a distinct edition topic. Repeating a generic subject each week makes it harder for readers to see what has changed.

8. Welcome and Onboarding Email Subject Lines

Welcome emails establish expectations. Onboarding messages guide a new user through setup or introduce features that help them begin.

113. Welcome to [Brand Name]
114. Thanks for Subscribing to [Newsletter Name]
115. Start Here: Your First Steps
116. Confirm Your Email Address
117. Set Up Your [Product Name] Account
118. Your Getting-Started Guide
119. Complete Your [Product] Setup
120. How to Get Started With [Product]
121. Your First [Resource Name]
122. Explore the Main Features of [Product]
123. Need Help With Your Setup?
124. Getting Started With [Service Name]
125. Make More of Your [Product] Account
126. Your Welcome Guide and Next Steps
127. What to Expect From [Brand Name]
128. Your First Week With [Product]

“Confirm Your Email Address” belongs in a message where confirmation is required. “Thanks for Subscribing” should follow a successful subscription event.

“Complete Your [Product] Setup” is appropriate when a real setup task remains. If the recipient has already completed it, the reminder becomes inaccurate.

Welcome emails should also set expectations for future messages. A weekly newsletter subscription should not quietly become a daily promotional sequence.

9. Follow-Up and Transactional Email Subject Lines

Follow-ups refer to a real interaction, request, or task. Transactional messages communicate account or transaction events and must accurately describe what happened.

129. Checking In on [Specific Business Goal]
130. Have You Reviewed the [Proposal Name]?
131. Your [Project Name] Milestone Review
132. Notes From Our [Date] Meeting
133. The [Document Name] You Requested
134. Questions About the Options We Discussed?
135. Your [Request Type] Has Been Updated
136. Confirming the [Project] Deadline: [Date]
137. Approval Needed Before [Date]: [Document Name]
138. Reminder: Appointment on [Date]
139. An Update on Your [Service] Inquiry
140. What Do You Need to Finalize [Decision]?
141. Follow-Up: [Specific Action] for [Project Name]
142. Your Order [Order Number] Has Shipped
143. Password Reset Requested for Your Account
144. Your Invoice for [Billing Period] Is Ready

“Checking In on [Specific Business Goal]” suits an established relationship or a previously discussed goal. Without that context, it may sound like unsolicited sales outreach disguised as a personal message.

“Your [Request Type] Has Been Updated” should refer to a genuine status change. The email should explain what changed and whether the recipient must act.

“Your Order [Order Number] Has Shipped” should be sent only after the order has actually shipped. “Your Invoice for [Billing Period] Is Ready” should link to the correct invoice.

For messages mixing transactional and commercial content, the FTC’s primary-purpose test also matters; see Section 15.

10. Re-Engagement Email Subject Lines

Re-engagement messages can introduce new material, offer control over message frequency, or make subscription management easier.

145. Would You Like to Keep Receiving [Newsletter Name]?
146. New Developments in [Topic] This Month
147. Still Interested in [Declared Interest]?
148. Your Next [Topic] Reading Recommendation
149. Choose the Topics You Want in Your Inbox
150. [Topic] Resources Published This Month
151. Would Monthly Updates Suit You Better?
152. Update Your Email Preferences
153. Which Topics Should We Cover Next?
154. What’s Changed in [Product Name]?
155. New Features in [Product Name]
156. Is [Newsletter Name] Still Relevant to You?
157. Receive Updates About [Topic]
158. Choose Your Email Frequency
159. Pause or Adjust Your [Newsletter Name] Updates
160. Manage Your Subscription to [Newsletter Name]

“Choose the Topics You Want in Your Inbox” is useful when the preference center genuinely offers topic choices. Otherwise, the subject promises a control that the recipient cannot use.

“Would Monthly Updates Suit You Better?” gives a subscriber an option to reduce email frequency. The message should lead to a working preference setting.

“Manage Your Subscription to [Newsletter Name]” should take recipients to a clear subscription-management page, with a straightforward way to update preferences or unsubscribe.

11. Weak vs. Better Email Subject Lines

The revisions below illustrate how more specific wording can make an email’s purpose easier to recognize. They are editorial examples, not tested performance claims.

The improved wording should still match the actual email. Do not use a discount, deadline, or status that cannot be verified.

12. How to Write Better Email Subject Lines

Make the message identifiable

Name the report, product, project, offer, or requested action. “Your Website Project Delivery Date Has Changed” is more informative than “Important Update Inside.”

Keep length and formatting in context

Mailchimp recommends no more than nine words and 60 characters, no more than three punctuation marks, and no more than one emoji. These recommendations are based on Mailchimp’s analysis of open-rate performance among emails sent through its platform. They are not universal deliverability requirements or guarantees of results.

Personalize with reliable information

Use a name, role, project, or declared interest when it adds context. Configure fallback values where supported, and preview the email when personalization fields are empty.

Pair the subject with preview text

Preview text appears beside the subject line in many inboxes. If it is not configured, an email client may display the beginning of the message.

Source: Mailchimp — About Preview Text.

Keep the subject accurate

Google says email subjects, headers, display names, and content should accurately represent the sender and message. Do not start a subject with “Re:” or “Fwd:” unless the message is an actual reply or forward.

Source: Google — Email Sender Guidelines.

Measure the outcome that matters

Choose metrics based on the campaign’s purpose. Clicks, qualified replies, registrations, purchases, unsubscribes, and revenue may provide more relevant evidence than opens alone.

For the limitations of third-party open-rate data, see Section 15.

13. How to Test Email Subject Lines

A subject-line test should answer one specific question. Define the success metric before sending and keep the audience, email content, sender name, and sending conditions as consistent as possible.

For example:

• Version A: Your Guide to Better Email Campaigns
• Version B: Five Ways to Improve Your Next Email Campaign

Both versions address the same topic but emphasize different angles. The results can help show which approach better serves the audience under those conditions.

Mailchimp recommends at least 5,000 subscribed contacts for each test combination to obtain the most useful data in its workflow. Smaller tests can still reveal audience preferences, but the evidence may be less conclusive.

Mailchimp’s A/B workflow can compare subject-line wording and other variables. Choose a success criterion that matches the test setup and campaign objective. Mailchimp explicitly recommends selecting a winner by click rate when email content is the test variable, because opens happen before recipients view the content. That recommendation should not be generalized into a rule that click rate is mandatory for every subject-line test.

Mailchimp also recommends waiting at least four hours after sending an A/B test before sending the winning combination. These are platform-specific recommendations, not universal statistical rules.

Sources: Mailchimp — Create an A/B Test and Mailchimp — Create a Multivariate Test.

Record the audience, versions, preview text, metric, sending conditions, and result. If the evidence is inconclusive, record that outcome instead of declaring an unsupported winner.

14. Email Subject Line Checklist

Before sending, confirm the following:

• The subject accurately reflects the email.

• The main topic or benefit appears early.

• The wording fits the audience and message type.

• Discounts, deadlines, and claims have been verified.

• Personalization fields and fallback values render correctly.

• Preview text adds context.

• Links, attachments, and calls to action work.

• The email displays correctly on mobile and desktop.

• The sender identity is recognizable.

• Applicable consent, unsubscribe, and authentication requirements have been addressed.

• The campaign’s success metric is defined before sending.

• Test results and uncertainties will be recorded.

15. Email Deliverability and Compliance

A subject line alone cannot guarantee inbox placement. Authentication, sender reputation, recipient engagement, complaint rates, and sending practices also influence delivery.

Gmail sender requirements

Google’s guidelines apply to email sent to Gmail accounts. All senders must meet the requirements Google lists, including SPF or DKIM authentication. Senders who send more than 5,000 messages per day to Gmail accounts must meet additional requirements, including SPF, DKIM, DMARC, aligned authentication for direct email, and one-click unsubscribe for marketing and subscribed messages.

Google advises keeping spam rates reported in Postmaster Tools below 0.10% and avoiding ever reaching 0.30% or higher. These are Gmail sender guidelines, not universal laws for every provider or country.

Google also says it does not track open rates and cannot verify the accuracy of open rates reported by third parties. A low reported open rate alone is not reliable evidence of a deliverability or spam-classification problem.

Source: Google — Email Sender Guidelines.

Yahoo sender requirements

Yahoo’s sender guidance distinguishes requirements for all senders from additional requirements for bulk senders. Yahoo advises keeping spam complaint rates below 0.3%. Bulk-sender requirements include SPF and DKIM authentication, a DMARC policy, and one-click unsubscribe for marketing and subscribed messages.

Yahoo’s section titled “Be compliant with RFCs and CAN-SPAM” also tells senders to comply with CAN-SPAM regardless of where in the world they send mail. This is Yahoo’s published sender guidance; it should not be interpreted as a statement that one law universally governs every jurisdiction.

Source: Yahoo Sender Hub — Sender Best Practices.

US commercial email and CAN-SPAM

The FTC’s CAN-SPAM guidance addresses truthful sender information, accurate subject lines, clear and conspicuous identification of commercial email as an advertisement, a valid physical postal address, an opt-out mechanism, and timely handling of opt-out requests. The law covers commercial email, including business-to-business commercial messages.

FTC allows flexibility in how an advertisement disclosure is made, but it must be clear and conspicuous. Deceptive subject lines remain prohibited.

Prior affirmative consent exception: The FTC’s Candid Answers to CAN-SPAM Questions explains that recipients’ prior affirmative consent exempts the sender from the requirement to identify the message as an advertisement or solicitation. The exception is limited to that disclosure requirement. All other CAN-SPAM requirements still apply, including accurate header information and subject lines, a valid physical postal address, an opt-out mechanism, and prompt handling of opt-out requests.

For messages mixing transactional or relationship content with commercial content, the primary-purpose test matters. The FTC says a mixed email may be commercial if a reasonable recipient interpreting the subject line would likely conclude that it contains an advertisement or promotion, or if the transactional or relationship content does not appear mainly at the beginning of the message.

Other countries may have different requirements. This article does not summarize the laws of every jurisdiction.

This section provides general information, not legal advice. Check official guidance for the jurisdictions and recipients relevant to your campaign.

Sources: FTC — CAN-SPAM Act: A Compliance Guide for Business and FTC — Candid Answers to CAN-SPAM Questions.

Last checked: 18 October 2026. Mailchimp — Best Practices for Email Subject Lines; Create an A/B Test; Create a Multivariate Test; Getting Started With Merge Tags; About Preview Text. Google — Email Sender Guidelines. Yahoo Sender Hub — Sender Best Practices. FTC — CAN-SPAM Act: A Compliance Guide for Business; Candid Answers to CAN-SPAM Questions.

16. Frequently Asked Questions

What makes a good email subject line?

A good subject line identifies the email’s purpose, sets a clear expectation, and accurately reflects the content.

Do personalized subject lines always perform better?

No. Personalization may help when it is accurate and relevant, but its effect depends on the audience and message. Compare personalized and non-personalized versions when the result can inform a real decision.

Should I use emojis in email subject lines?

Mailchimp recommends using emojis to supplement words and testing how they render across devices. The message should remain understandable if the emoji looks different or is not displayed as expected.

Can a subject line guarantee inbox delivery?

No. Authentication, sender reputation, complaint rates, recipient engagement, and sending practices also affect delivery. Follow the current requirements of the provider receiving the messages.

What is the difference between a subject line and preview text?

The subject line identifies the email. Preview text adds supporting context that may appear beside it in the inbox.

Does CAN-SPAM apply to every email worldwide?

CAN-SPAM is a US law governing covered commercial email. Yahoo’s published sender guidance separately tells senders to comply with CAN-SPAM regardless of where they send mail. That is a provider requirement, not a statement that US law replaces the laws of every other jurisdiction. Check the official requirements relevant to your recipients and sending practices.

17. Conclusion

A subject line is a promise about what the recipient will find inside the email. Accuracy makes that promise credible: an offer must exist, a deadline must be real, and a transactional notice must describe an event that actually happened.

The quality of an email program also depends on whether its decisions can be explained. Keep a record of what was tested, which metric informed the decision, and what remains uncertain. That record turns campaign learning into a repeatable business process rather than a collection of unverified assumptions.

18. References

1. Mailchimp — Best Practices for Email Subject Lines
2. Mailchimp — Getting Started With Merge Tags
3. Mailchimp — About Preview Text
4. Mailchimp — Create an A/B Test
5. Mailchimp — Create a Multivariate Test
6. Google — Email Sender Guidelines
7. Yahoo Sender Hub — Sender Best Practices
8. Federal Trade Commission — CAN-SPAM Act: A Compliance Guide for Business
9. Federal Trade Commission — Candid Answers to CAN-SPAM Questions