emacs has built in smtp support, so I just use that.<p>Notably, I use the smtpmail-multi package along with smtpmail in emacs to support sending from whatever address I put in the To: line[0]<p>[0]: <a href="https:&#x2F;&#x2F;github.com&#x2F;codemac&#x2F;config&#x2F;blob&#x2F;master&#x2F;emacs.d&#x2F;boot.org#sending-mail" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;codemac&#x2F;config&#x2F;blob&#x2F;master&#x2F;emacs.d&#x2F;boot.o...</a>