[Pkg-exim4-users] Connecting IP address

[Iain Mac Donald]

Recently I had a problem sending mail to recipients at AOL. Upon
investigation, using AOLs ipconfirm tool, it was apparent that the
reported IP address wasn't what I considered to be my primary IP address
but rather the last on the list of aliased addresses.

The snipped example output of exim4 -d+interface -bt
somebody at somedomain.com

Actual local interface address is 127.0.0.1 (lo)
Actual local interface address is 91.xxx.xxx.20 (eth0)
Actual local interface address is 91.xxx.xxx.21 (eth0:0)
Actual local interface address is 91.xxx.xxx.22 (eth0:1)
Actual local interface address is 91.xxx.xxx.23 (eth0:2)
Actual local interface address is ::1 (lo)
Actual local interface address is [IPv6 address] (eth0)

The reported IPv6 address doesn't seem to be valid. The FQDN has a DNS
and rDNS entry equating to the primary IPv4 address.

I have "fixed" the problem by inserting 
interface = 91.xxx.xxx.20

I have two questions - where does the IPv6 entry come from and why does
the 91.xxx.xxx.23 address get used?

I am using Exim version 4.62-1


-- 
Regards,
Iain.