Using sendmail as outbound MTA, but with SSL

From: Matthias Apitz <guru_at_unixarea.de>
Date: Fri, 19 Dec 2025 13:47:17 UTC
Hello,

Since ages I do use mutt as MUA to leer mit correos (fetched with IMAPs)
and send outboud via a normal senmail configuration in my laptop
(configured in /etc/mail/ the normal way with make). All this works
fine, as said since ages, when I'm in Europe. sendmail delivers the mail
by SMTP to port 25 of my ISP smtp.1blu.de.

When I'm in Cuba, connected via data mobile to the cuban cellphone
network, they block outbound port 25 traffic, for whatever reason and I
have to bypass sendmail with a configuration in mutt to send mails to
smtp.1blu.de:465

I have had a look into the port mail/ssmtp which addresses this problem sending
mail to port 465, but has no queuing etc. of mails.

My question is, is there a way to configure sendmail to use SSL port 465
to the remote mail HUB?

Thanks	

	matthias


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Matthias Apitz, ✉ guru@unixarea.de, http://www.unixarea.de/ +49-176-38902045
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