On 4.4.2012, at 16.57, Patrick Domack wrote:
Quoting Timo Sirainen tss@iki.fi:
On 4.4.2012, at 16.04, Patrick Westenberg wrote:
Timo Sirainen schrieb:
where lmtp.example.com expands to your two IP addresses. DNS server handles load balancing by returning IPs in round robin and Postfix handles fallbacking to the second IP if the first one doesn't work. Dovecot has similar behavior in several places.
As far as I understand, lmtp.example.com with out records would result in a MX-lookup. If postfix behaves for lmtp like it does for smtp, it will try all listed MX (my directors) in turn.
MX lookups are intended for SMTP, I very much doubt LMTP uses them?
Yes, but postfix lmtp is the same binary as smtp, at least currently.
That's about how to handle incoming lmtp vs. smtp connections. The outgoing smtp vs. lmtp connections are always handled by the same binary anyway.