git-send-email Causes "Must issue a STARTTLS command first" Error

Question

I am attempting to send a patch with git-send-email through my Postfix mail server. Unfortunately, whenever I do, I just get this error spat back to me:

<[e-mail]>: host domain.markzz.net[xxx.xxx.xxx.xxx] said: 530 5.7.0
Must issue a STARTTLS command first (in reply to MAIL FROM command)

As far as I know, I have properly set up TLS on the Postfix server and have no other issues except when using git. A few days ago even, I used git-send-email to send a patch to the same address.

If anyone needs any more information, feel free to ask.

Answer 1

The patch was too long and all that is needed it to break it into smaller patches.