I'm having difficulties configuring smtpd as a backup mail server. smtpd
is running on my main mail server and works a treat. (Good riddance,
sendmail.)
I've read the man pages and understood them the best I can, and tried
various configuration options, all to no avail. Mails to known valid
users on the backup server continue to be rejected with 550 responses.
The goal, of course, is for this backup server to accept these mails and
relay them to the main mail server host.
This is on 5.3-current with smtpd 5.3.3.
Here is my smtp.conf (in its entirety):
listen on all
table aliases db:/etc/mail/aliases.db
table domains file:/etc/mail/domains
table secrets db:/etc/mail/secrets.db
# Relay to main mail server via TLS
accept for domain <domains> relay via \
tls+auth://[email protected] auth <secrets>
accept for local alias <aliases> deliver to mbox
Here is the debug output from smtpd for one of the rejected messages:
# smtpd -d -v
info: OpenSMTPD 5.3.3 starting
debug: bounce warning after 4h
debug: using "fs" queue backend
debug: using "ramqueue" scheduler backend
debug: using "ram" stat backend
info: startup [debug mode]
debug: init server-ssl tree
debug: init client-ssl tree
debug: parent_send_config_ruleset: reloading
debug: parent_send_config_mfa: reloading
debug: parent_send_config: configuring smtp
debug: mfa ready
debug: queue: done loading queue into scheduler
debug: smtp: listen on IPv6:fe80::224:1dff:fe86:2895%re0 port 25
flags 0x0 cert ""
debug: smtp: listen on 99.132.212.18 port 25 flags 0x0 cert ""
debug: smtp: listen on 127.0.0.1 port 25 flags 0x0 cert ""
debug: smtp: listen on IPv6:fe80::1%lo0 port 25 flags 0x0 cert ""
debug: smtp: listen on IPv6:::1 port 25 flags 0x0 cert ""
debug: smtp: will accept at most 500 clients
debug: smtpd: scanning offline queue...
debug: smtpd: offline scanning done
debug: smtp: new client on listener: 0x81a09170
smtp-in: New session 000000004aa75c26 from host
mail-la0-f48.google.com [209.85.215.48]
smtp-in: Failed command on session 000000004aa75c26: "RCPT
TO:<[email protected]>" => 550 Invalid recipient
smtp-in: Closing session 000000004aa75c26
debug: smtp: 0x85d02000: deleting session: done
In this case, the recipient 'george' is a local user on the backup
server host. I cannot understand why the mail has been rejected in this
case.
I've also tried various options using 'relay backup' without success.
The man page does not give an example for backup servers. So, I'm not
sure how to proceed.
Many thanks in advance for any guidance you can offer.
