On Thursday 11 July 2002 06:52 pm, Sam Varshavchik wrote: > Yeah, so the secondary's going to try to immediately contact the primary, > which is temporarily unavailable (obviously), so the secondary is going to > defer the mail, and try again later. The mail that you see off the > secondary is from the secondary's redelivery attempt.
At my workplace, we have two domains setup where a secondary MX might be of use. 1. For one domain, a machine has two network interfaces, whose IP addresses are the two MXes of that domain. 2. For the other domain, the two MXes (running sendmail) pass incoming emails off to a third server where all mailboxes are hosted, to be retrieved by users via POP/IMAP/whatever. In both cases, the two MXes point to IPs hosted on different ISPs; and we do have not very infrequent downtimes on either. ISPs in India aren't exactly well known for their reliability ;-) As I see it, for domain 1, the second MX helps only when a link goes down, but for domain 2, it helps even if one of the MXes goes down too. Binand ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek PC Mods, Computing goodies, cases & more http://thinkgeek.com/sf _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
