It’s not uncommon for individuals and business to have formatting and deliverability issues with their email signatures, granted it depends on the complexity of the signature. I created mine in html and then added it to apple mail in an obscure way but I feel it’s pretty consistent but just on Mac. Apple mail on iOS/iPadOS does it differently. The issue mainly is not just the complexity but the device its on – most email clients dont support html signatures. It’s a real pain point for sure.
You’ve probably seen the plethora of email signature generators out there like https://www.wisestamp.com/, https://www.hubspot.com/email-signature-generator, https://www.canva.com/create/email-signatures/, and https://mysignature.io. If you haven’t, now you have. Go check ’em out! Those tend to be good but all come with a cost.
There’s a product by codetwo.com, https://www.codetwo.com/email-signatures/, and one by exclaimer, https://exclaimer.com/, which can, in the cloud, append the signature on all outgoing emails, removing the need to add a signature at the email client level and they can do more than just signatures. For instance, codetwo.com says “Create and manage email signatures, legal disclaimers, automatic replies and marketing campaigns for all users in your Microsoft 365 organization. CodeTwo Email Signatures 365 is a cloud service that works with all email apps and devices, including Windows, Mac, mobiles and tablets.” Those 2 products might be overkill for your organization, definitely overkill for you as an individual, but they’d sure take the signature headache out of the equation, minus the major fees.
I wish there was a free email signature solution out there but I haven’t come across one. Years ago, I spun up a public-facing WordPress website for a client and used some plugins to create a special post format to handle the data they wanted in their email signatures. To create a signature, all that’s needed is to create a new post, answer some questions, add a photo and publish! The email signature is then seen on the front end. Of course, the front end can only be seen after logging in. Then the users of the org can sign into the site, click on their name, view their sig and copy and paste it in their email program (typically gmail.com). Now, the email program does mess with the formatting some but I’ve tried to make the code behind the signatures as friendly as possible. And what do you know, it works pretty good! Sometimes I’m thankful for technology.