120+ Best Introduction Email Subject Lines [2021]

120+ Best Introduction Email Subject Lines [2021]

If you're looking to boost your email open rates and increase sales, your email subject line is the first (and most important) step in achieving those goals.

Did you know that 33% of email recipients open emails because of an engaging subject line?

That's why it's critical to craft a catchy email subject line that will get you the traffic and conversions you deserve.

We've put together a list of 120+ best introduction email subject lines [2021].

Some are proven examples from other successful campaigns, and some are creative ideas to inspire you.

Creative Email Subject Line Ideas

  • HI, [NAME], great chatting with you at that event
  • [NAME], did you have the time to think about our call from the other day?
  • My opinion on [TOPIC], let me know what you think
  • [Name] and [Name] Introduction
  • Hello, Mr.|Mrs. [NAME]. I’ve learned so much following your work
  • Introduction to Sammy from Sammy’s Cafe
  • Reaching Out for Partnership Opportunity 🤝
  • Hi, [NAME], just following up to the call we had on [DAY]
  • Additional outreach/introductory networking email subject lines
  • NAME], can you please help me with [TOPIC]
  • Hello from LOCALiQ
  • Connecting: [Name] - [Name]
  • You have such extensive experience about [TOPIC], would love to hear more
  • Hi, [NAME], I think you’ll find this interesting
  • Sheeba suggested to reach out
  • Your recent story is very exciting
  • We just wanted to say Hi
  • [MUTUAL CONTACT NAME] told me you know a lot about [TOPIC]. Hope we can discuss it sometimes
  • Connecting two people in your network
  • Hey, [NAME], let me introduce myself
  • Have you met your new neighborhood tailor?
  • Saying hello + a quick question about [TOPIC]
  • Just read your opinion on [TOPIC]. Wow!
  • Your current interview surprised me
  • Follow-up email to establish connection
  • Meet Your New Freelance Writer (we hope!)
  • Promised: Charity sponsorship
  • Zeba from the travel agency
  • Great to communicate with you at speed networking
  • Introducing ( Name 1- name 2)
  • Introduction to a blogger
  • I have some different insights on the topic you recently covered
  • Inquiring About Opportunities
  • I’ve been following your work for a long time. Let me briefly introduce myself
  • Introduction to a medium business expo
  • Follow-up email to continue the conversation
  • Reach out for partnership opportunity
  • [Name] Recommended I Contact You
  • Hi, it’s [YOUR NAME]. Let’s continue our discussion further
  • Hey, [NAME], I enjoyed our talk so much. Ping me when free to talk some more
  • Inspired by your post on [SOCIAL MEDIA]
  • Hello, hello, Hello
  • [NAME], I really found your piece inspiring – would like to discuss the topic further
  • Your latest work is awesome, [NAME]! Let me pick your brain 🤓
  • Reconnection email with request
  • Free for lunch Thursday? Join our Lunch and Learn!
  • From one [OCCUPATION] to another
  • Reconnection email to maintain relationship
  • Free Webinar: intro to conference.
  • Referred by [MUTUAL CONTACT NAME] to discuss [TOPIC]
  • Connecting Rekha with Meet
  • Do you already know this person?
  • You are invited to start breakfast.
  • Additional reconnection networking email subject lines
  • Your recent article blew me away
  • Get on the Road to Code: Free Class this Thursday
  • Don’t Miss Out…Football Tailgate Party
  • Informational interview email (career growth)
  • Free tea for marketing ideas
  • Want your support for charity.
  • Great talking to you on the phone, please let me know when free for more networking
  • Hi [NAME], [MUTUAL CONTACT NAME] friend here. We’ve met the other day
  • Meet Robert from your Alumni Network
  • [Name] Suggested I Reach Out
  • Would love to ask a few questions?
  • Introduction: [Name] - [Name]
  • Wednesday: Yappy Hour 6 p.m. at the Bark Park
  • Connecting ( Name 1- Name2)
  • Introduction to a freelance content writer
  • It was an honor talking to you in that meetup, [NAME]
  • I have some great info about [TOPIC]
  • Checking if we have spoken earlier
  • Introducing: Marketing business template
  • Free Workshop: Intro to Salesforce
  • Reaching out to someone you were referred to
  • Looking to swap ideas with a fellow [OCCUPATION]
  • Hi, [NAME], this is [YOUR NAME]
  • Introduction to a free blogs
  • I Found You Through [Alumni Network, LinkedIn, Professional Association, etc.)
  • Hi Tom, have you met with Mett?
  • Introduction ( Name1- Name 2)
  • Introduction from Pari from XYZ company
  • Referral from Priya
  • Can I buy you tea?
  • Hi, it’s [YOUR NAME]. [MUTUAL CONTACT NAME] introduced us at that event.
  • Referred by ( Name)
  • Introducing [Name] to [Name]
  • Introduction to free webinar
  • Meet Rehman from your Alumni Network
  • Enquiring for opportunities with you.
  • Wednesday: Hello, hello mail here.
  • Looking to learn more about [TOPIC]
  • Just thinking about what you told me during that meetup. Care to discuss it further?
  • Connecting Hina with Mina
  • Referred By [Name]
  • I have just read your article on [PUBLICATION], and I have a few questions about it
  • Additional follow-up networking email subject lines
  • Hi [NAME], let’s collaborate on this great project
  • Hello Hello, hey we are here!
  • Do you have Renu’s email?
  • About your work
  • Hey [NAME] 🙋‍♂️. I would love to hear your opinion on [ENTER TOPIC]
  • Connecting Angela with Mark
  • Introduction From [Your Name]
  • Introduction from ( your name)
  • Don’t miss, don’t miss. Introduce yourself
  • Eager to say Hello
  • Alumni network: Meet Harry
  • [NAME], let’s collaborate
  • Informational interview email (business owner)
  • I found you through Professional association
  • Big fan of your work asking for quick advice
  • Looking forward to speak with you
  • Here is the marketing budget template as discussed
  • You’re Invited to Startup Success Breakfast
  • Follow-up email after no response
  • Reaching out for a business opportunity
  • Hema recommend to connect with you
  • Referral From [Name]
  • I noticed that you know a lot about [TOPIC]

GUIDE: How To Write A Great Subject Line

As we mentioned above, crafting a catchy subject line is critical to the performance of your email campaign.

While just a few words may seem like a small piece of your overall message, this is the first impression your audience will have before they decide whether to open your email.

If your subject line isn't engaging or appealing enough, there's a chance it could get buried in your reader's inbox.

Let's go over the proven tips on how to craft a subject line that boosts engagement:

What makes a great subject line?

First, let's discuss the fundamentals of creating a great subject line:

  • Spark interest and curiosity
  • A clear and urgent call to action
  • An offer/intriguing discount
  • Personalization (this can be done by sending out different versions of emails to subscribers based on their preferences)
  • Relevance - make sure your subject line covers the current trends and topics within your industry

5 Tips To Crafting a Great Subject Line

Now, let's dive into the specifics of how to create a great subject line for your next campaign:

1. Use a familiar sender name

Although this may seem obvious, it's a piece many marketers miss the ball on.

Your readers want to feel like your email is coming from a human and not a corporation or automated system.

One of the easiest and most effective ways to do this is by changing the sender's name to YOUR name or someone in the company that is well known.

Here's a great example of this from Marketing Examples


Pro Tip

Avoid the "no-reply" sender name at all costs. This makes your email feel unfamiliar, unapproachable, and less personable.

2. Keep your subject short and to the point

If your subject line is too long, it will get cut off, which could impact your reader's chances of opening your email.

The rule of thumb (for both mobile and desktop) is to keep your subject line under 50 characters.

3. Add personal touches to your subject line

If you have access to information about your subscriber (ie. name, location, etc), you can use this to benefit your subject line and catch your readers attention.

It's important not to go overboard here, but adding even the simplest touch such as their name can build trust and rapport.

Here's a great example of a personalized email + offer I received from BarkBox with my dog's name in the subject line:


4. Avoid making any false promises

Your subject line makes a commitment to your reader, so it's important you don't stretch the truth just to simply get more opens and clicks.

In the grand scheme of things, making false promises will end up hurting your open rate as your readers will lose trust in you.

5. Give them a sneak peek of what's inside

Telling your subscriber what is inside helps with open and clicks.

For example, if you're providing your reader with a free guide or e-book, consider making your subject line something along the lines of:

"Your FREE marketing e-book awaits!"


If you want your email campaign to perform well, it all starts with your subject line.

Think about the emails you receive in your inbox and what makes you click vs what gets buried - odds are, the same habits go for your customer.

We hope you enjoyed our guide + list of 120+ best introduction email subject lines [2021].

Pat Walls,  Founder of Starter Story

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