There is a previous ticket which addressed this, but apparently the problem lingers...
A sourceforge user noticed the problem. I dug into it, and the problem lies with the email headers, not the body. Due to our reply-thread emails, the References email header can be quite long. This was tripping SMTP's line length limit.
I have pushed some fixes to dw/smtp_line_length
from __future__ import annotations
won't work (added in 3.7). I believe the Apache jenkins build uses 3.6 and will error on that.email.message
is available in 3.6 so can be imported & used without any__future__
stuff[#8404] ...
good feedback. I updated and pushed to dw/8404