Enigmail problem with SeaMonkey 2.53.4

[David Durgee]

I am encountering a problem that may be with Enigmail 2.0.9, the latest available SeaMonkey extension from 2018-12-09, when I attempt to compose an S/MIME signed or encrypted message. I have attached the debug log to this post.

I should note that this extension is missing the Debugging menu. I had to manually set extensions.enigmail.logDirectory to capture this log.

The behavior I see is that when I request an S/MIME signed email I cannot send it. It even errors when attempting to save a draft:

Save Draft Error
Unable to save your message as a draft.
You specified that this message should be digitally signed, but the
application either failed to find the signing certificate specified in
your Mail & Newsgroup Account Settings, or the certificate has expired.

I get a similar message about the certificate when attempting to send and the send is aborted. The only way I can send an email is to disable the S/MIME features.

The message is totally inappropriate. My certificates are present and are current. This has worked in the past, it started to happen when my certificates were renewed.

This does not prevent me receiving and decrypting or validating messages. In fact, interestingly, this works even if Enigmail is disabled.

Please tell me how to correct this problem. Do not bother telling me to use Thunderbird instead, I hate the changes that have been made to it in recent releases.

Dave

[Patrick Brunschwig]

SeaMonkey is not supported anymore since January 2019. SeaMonkey 2.49 was the last officially supported version. If Enigmail works on SeaMonkey 2.53 then that's sheer luck.

The question you have concerns S/MIME. That's not part of Enigmail, but core functionality in SeaMonkey. The only thing that Enigmail would do is to try to enable S/MIME if that's possible. To find out where the problem is, I'd suggest you disable Enigmail, and then try to see if you can send S/MIME signed or encrypted messaegs.