Jerry Geis sent a missive on 2010-02-08:
/Sorry to be more specific - make sure that devcentos5x64.msgnet.com is resolvable.
from pagestation.com I can "ping devcentos5x64.msgnet.com" - this entry is in the /etc/hosts file on that machine. There is no official MX record for devcentos5x64.msgnet.com there is for pagestation.com.
I'm not clear that there is a dns/host entry for devcentos5x64.msgnet.com on devcentos5x64.msgnet.com. I would make sure that there is an entry for this host on devcentos5x64.msgnet.com. If there is then apologies for not getting it :-).
on pagestation.com I have the /etc/hosts entry and /etc/mail/access entry for devcentos5x64.msgnet.com Perhaps its an MX lookup timeout value.
I am looking for a timeout setting or a way to place an entry in a config file that says "I know this server or machine", trust it and dont delay. Is there such a setting?
I think that sendmail is checking the "MAIL" command - there are no timeouts that are specific to this rule afaik and sendmail would use a timeout of 1 second (which is doubled to a max of 4 mins) if this was an issue with bogus commands or repeated commands. From your description, it "feels" as if there is a problem with the name resolution of devcentos5x64.msgnet.com. You may wish to enable FEATURE(delay_checks)dnl in the sendmail.mc and rebuild the sendmail.cf file and see if it helps. If this makes a difference then I would look in the MAIL command checks.
Simon.