smtpserver(8) on Linux
The text 8d292bb8368d, as Debian 2.1 (Slink), Debian 2.0 (Hamm) shipped it.
zmailer SMTP server
Flags it lists
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-4 -
-6 -
-B -
-C -
-L -
-M -
-P -
-R -
-V -
-a -
-g -
-i -
-l -
-n -
-p -
-s