153 will not deliever from the Outbound
steve.freegard at fsl.com
Fri Aug 18 16:41:51 IST 2006
Billy A. Pumphrey wrote:
> On the particular emails that I was checking to make sure that they went
> through have. So everything is going to iron out looks like. (Outbound
> down to 23 now)
> However, questions if someone would be so kind to answer them.
> MailScanner was always working fine, it was the exchange machine that I
> messed up and it started blocking connections to only certain emails.
> What does sendmail do with these emails?
> Apparently holds on to them until they are delivered and are referred
> to as deffered?
> There was a log entry that sent a notification to the sender that it
> failed after 4 hours. What happens after that?
By default - a notification is sent every 4 hours, then if the mail is
still undelivered after 5 days a delivery service notification (DSN) is
sent back to the user stating that the message could not be delivered
and the message is deleted from the queue.
> Why does it wait so long before trying to send the deffered emails
> again, assuming that is a sendmail setting?
Could be a number of factors -- by default on a RedHat system the queue
is run every 15 minutes.
Some systems might set confHOST_STATUS_DIRECTORY which holds a 'cache'
of hosts and their status and therefore if a host is marked as 'down'
the messages will be skipped for that host until the cache expires
(default 30 minutes).
> Can you tell sendmail to process them "now"?
To run force a queue run in the background:
To run the queue and watch the output
sendmail -q -v
To run the queue and skip using the HOST_STATUS_DIRECTORY (if defined)
More information about the MailScanner