ref: 581bb4edf342d41e13610c5761e1b5f73c4bd95b
dir: /smtpd.ms/
Copy /bin/service/!tcp25 to /bin/service/tcp25. You may need to make some changes.
.LP
Make sure to chmod +x /bin/service/tcp25 or else the mail server won't be able to start
.P1
; cat /bin/service/tcp25
#!/bin/rc
#smtp serv net incalldir user
user=`{cat /dev/user}
exec upas/smtpd -s -e -n $3
.P2
.LP
Make sure to edit /mail/lib/smtpd.conf:
.P1
#
# sample smtpd configuration options for inside connections
#
#
# replace example.com with the name of your domain
# replace 198.51.100.0 with the IP address range of your networks
defaultdomain example.com
norelay on
verifysenderdom off #disable dns verification of sender domain
saveblockedmsg off #save blocked messages
#
# if norelay is on, you need to set the
# networks allowed to relay through
# as well as the domains to accept mail for
#
ournets 198.51.100.0/24
ourdomains *.example.com
Copy /mail/lib/rewrite.direct to /mail/lib/rewrite, while replacing YOURDOMAIN.DOM with your actual domain name.
You will also want to edit /mail/lib/names.local for the users you want to handle mail for.
Make sure to replace yourdomain.dom in /mail/lib/remotemail to use your actual domain.
If you are logged in as a user other than the default hostowner (glenda), you will need to create the user's mailbox:
; upas/nedmail -c
.P2
.LP
See dkim.ms guide for enabling dkim. Make sure to add spf and dmarc records as indicated in ndb.ms guide.
To test sending an email:
.P1
; upasname=sender@example.com upas/marshal -s 'Alpha Bravo Charlie' recipient@example.org
.P2
Type a message, then a newline, then EOF.
If your email address is simply $user, you may be able to omit the upasname variable provided the domain is correctly configured elsewhere.