Email Signature Software
for your small business

An average employee or business owner sends around 10,000 emails every year! Make every email you send count. Brand every email with your own custom HTML email signature.

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  • The service your website provides is exactly what we were looking for and has been easy to use all around!
    - Chad Terrell, Dude Perfect

  • Great for business and easy to use. I have all my social media links and icons and website link to the signature. Easy to create and add to our emails.
    - Gabriel Tubella, Pretium Homes

  • I get comments on how great my email signature looks and I love knowing it looks that great for everyone who opens an email from my business. Thanks email signature rescue!
    - Loren Waller, The Food Werewolf

  • Email Signature Rescue was exactly what we needed to create multiple email signatures that look good and are easy to create and update. Would definitely recommend it to other small businesses.
    - Ellen De Vries, OSCAR Natural

  • We love our signatures. We have had many different signature solutions over the years and Email Signature Rescue has by far been the best solution we have found.
    - Marc Headley, Mode Systems

  • What Email Signature Rescue has done to take the heavy lifting out of email signature design is stellar. Keep on doing what you're doing.
    - David Schmeikal, Rivitt

  • Love, love, love the new email signature that I created for our business! It looks so professional, and conveys all of the relevant links for our customers to connect with us. Beyond happy!
    - Tracy Jones, Premier Roofing Co.

  • So easy to use and the results are incredible. I have never seen so many people notice my signature and compliment it.
    - David Malka,

email signature rescue

Email clients that have character limits in their email signature settings

There's at least six email clients that we know of that have character limits in their HTML email signature settings. They are:

  • AOL Mail
  • Outlook Office 365
  • Yahoo Mail
  • Gmail
  • Google Inbox

Why they have character limits is a mystery, it's not answered anywhere we can find, but we can only assume that since all of these email clients are hosted online, the reasoning for the character limit in the email signature settings is to save on storage space.

Download Our New Free Browser Extension

No more character limits on your Google Inbox, Outlook Office 365, Gmail, Yahoo! Mail, AOL Mail and email signatures! Download our Browser Extension FREE to install your HTML signature. Available now for Chrome, Firefox, Internet Explorer and Safari.

Available now!

Gmail's email signature character limit

Out of the list above, Gmail is the least worst offender, with a limit of 10,000 characters. It doesn't really interfere too much with creating an awesome email signature and you can use all of the email signature templates available on our website. So we may as well cross Gmail off the list above, unless you need an extremely long disclaimer or lots of social icons, you should be fine.

Yahoo Mail email signature character limit

Yahoo Mail gives you less characters to play with than Gmail, but more than the other three. You can usually include a couple of social icons, but no disclaimer or green messages.

Overcoming the Email Signature Character Limits in Yahoo Mail

If your email signature will not save in Yahoo Mail, you may have to make it shorter, remove disclaimers and green messages and additional social icons. Below is an example of an email signature that will save in Yahoo Mail and one that will not save.

yahoo email signature wont save
This email signature won't save.
yahoo email signature correct
This email signature will save. and Office 365 email signature character limit

If using or Office 365, you won't be able to include social icons, a green message or a disclaimer in your email signature. We have read that the character limit for and Office 365 is 8kb, but on testing this, we could not include an 8kb, or even 7kb signature in either or Office 365. The largest we could include was around 5.8kb, which doesn't leave much room for the HTML that has to be included to make the signatures function correctly across all major email clients.

Overcoming the Email Signature Character Limits in and Office 365

While and Office 365 do enforce a pretty strict character limit in their email signature settings, the situation isn't entirely futile. If your email signature will not save, you may have to make it shorter, but don't worry, you can still have a great looking email signature just like this example. email signature wont save
This email signature won't save. email signature correct
This email signature will save.

AOL Mail

And finally, we come to AOL Mail. The character limit in the signature settings of AOL Mail is the shortest of all email clients that we know. Like so ridiculously short, we don't even know why they included it in the first place. We could not get any of our templates to save, even after removing all of the social icons, images and most of the text!

Overcoming the Email Signature Character Limits in AOL Mail

AOL Mail users, you are better off using a plain text email signature, with only a few characters and unfortunately not our templates. Or if you really, really, really do want to use our templates, you could always import your AOL Mail into one of our supported email clients.

Email Signature Software

Use our online Email Signature Software to create, customize and manage all your HTML email signatures. Learn More

Email Signature Templates

Customize over 20 professionally designed, coded and tested HTML email signatures using our online software. Learn More

Install in 45+ Email Clients

Install email signatures manually or automatically in over 45 major email clients and software. Learn More

Everything you need to create, customize and manage email signatures.

Over 80,000 email signatures created with Email Signature Rescue
  • Universal Music
  • Dude Perfect
  • Keller Williams
  • General Electric
  • University of Sydney
  • Remax
  • Century 21
  • Seattle University
  • UPS
  • Maps People
  • Auto Alert
  • The Collective
  • We Love to Travel
  • Amcal
  • Sales-Lentz Group
  • Oscar
  • Whites & Co
  • Apkudo

Email Signature Software for your small business.