Unable to Verify Message Signature (when sending mail)

I have seen this question asked a few times, and after a little searching, I found someone that had the answer. However, Apple does not tie all of these same questions together. So, if anyone is still having this problem, here is the fix....

Posted on Oct 23, 2018 9:17 AM

Similar questions

Mail cannot verify message signature Mail cannot verify message signature
651 1
When I send e-mail to accounts in Yahoo or AOL, I get the message "Unable toi verify message signature" When I send e-mail to accounts in Yahoo or AOL, I get the message "Unable toi verify message signature"
535 5
Messages app is doing things I don't understand For example, when my bank or someone else sends me a two step verification code, I get it on my phone, but not the Mac I'm sending it from. I've gone into Messages>Preferences and everything is the same as it has always been. I'm using Big Sur, which was true when things were working fine. Even worse for me is that I sent a message today to someone in my Contacts book and it failed every time I tried. Usually I can apply logic to find solutions, but this thing has me stumped. Any advice would be most appreciated.
278 4

2 replies

kulyk

Level 1

16 points

Nov 20, 2018 7:26 AM in response to MacGeekTracie

thx for that answer !

helped me in macOS 10.13

BDAqua

Level 10

250,409 points

Nov 20, 2018 8:19 AM in response to MacGeekTracie

Nice work.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Unable to Verify Message Signature (when sending mail)

Welcome to Apple Support Community

A forum where Apple customers help each other with their products. Get started with your Apple Account.

Learn more Sign up