Subject: sendmail message collect timeout in NetBSD 3.0_RC5
To: None <tech-net@NetBSD.org>
From: Alicia da Conceicao <firstname.lastname@example.org>
Date: 12/06/2005 17:19:51
I decided to upgrade one of my e-mail servers from NetBSD 1.62 to
NetBSD 3.0_RC5. Everything seems to work with one exception, and
that is sendmail.
Specifically, many of the incoming messages hang and timeout,
with the following error message:
451 4.4.1 timeout waiting for input during message collect (held)
421 4.4.1 gate1.engine.ca Lost input channel from mail.bubo.net
This looks like a Path MTU Discovery issue, since the external
interface only has an MTU of 1460.
However, I allow all related ICMP packets to pass through in my
pass in quick proto icmp from any to any icmp-type 3 code 4
pass out quick proto icmp from any to any icmp-type 3 code 4
Much of the configuration in the new NetBSD 3.0_RC5 is identical
to the previous NetBSD 1.62, so I am at a loss as to why my
incoming e-mail is timing out.
Any suggestions are greatly appreciated.
Thank you in advance,