The example file ssmtp.conf.sample does not at all mention either STARTTLS or authentication for target MTAs, something which I assume is needed by many people.
Would it be a good idea to at least add, in comments, an indication thereof? Something along these lines, maybe:
--- ssmtp.conf.sample 2019-11-15 16:44:44.000000000 +0000
+++ ssmtp.conf.sample.new 2019-12-12 14:18:53.946701000 +0000
@@ -41,3 +41,11 @@
# If you want to have debugging of the config file parsing, move this option
# to the top of the config file and uncomment
+# Use these parameters for securely authenticating against your
+# mailhub; check ssmtp.conf(5) for further details.
I'd also like to point out that the home page for ssmtp as recorded at  is
no longer valid and seems to have moved to https://packages.qa.debian.org/s/ssmtp.html
(In reply to Jan-Piet Mens from comment #0)
The patch should ideally be upstreamed.
A commit references this bug:
Date: Thu Mar 5 16:26:22 UTC 2020
New revision: 527841
Mention AuthUser/Pass in sample configuration file
The example file ssmtp.conf.sample does not at all mention either STARTTLS
or authentication for target MTAs. This patch fixes that.
Also, update WWW.
Submitted by: Jan-Piet Mens <firstname.lastname@example.org>
Approved by: email@example.com (maintainer timeout)
(In reply to Mateusz Piotrowski from comment #1)
I sent a message to the author in December, but it wasn't responded to.