On 6/24/2013 12:18 PM, Eric Faurot wrote:
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.
"relay backup" is used to setup secondary mail servers for a domain,
that is a server that accept mails for a domain and relay to MXs with
higher priority (i.e. lower preference in DNS).
So when you specify 'mx' as a parameter for the 'backup' keyword, what
does that mean precisely? A DNS server host name? A preference value?
When I see MX, I think of the MX records in the DNS zone file. I tried
using a preference value, and that was rejected by smtpd as invalid.
