I would like to check if I am understanding setting a backup MX correctly.
Am I missing something here ?
DNS settings
example.com primary-mx.example.com 10
example.com backup-mx.example.com 20
Backup MX postfix settings
/etc/postfix/main.cf:
myorigin = example.com
mydestination =
local_recipient_maps =
local_transport = error:local mail delivery is disabled
relay_domains = example.com
relay_recipient_maps = lmdb:/etc/postfix/relay_recipients
maximal_queue_lifetime = 7d
/etc/postfix/relay_recipients:
[email protected] OK
[email protected] OK
/etc/postfix/master.cf:
relay unix - - n - - smtp
-o syslog_name=postfix/relay
#Comment out the local delivery agent
# local unix - n n - - local
Thanks
