No, server X does not relay for the domains hosted on server Y (I do not have relay-domains file on X for for those domains that are on Y). Should I have it? May it cause any problems -- a lot of unwanted mail, spam? X is only backup MX for the domains that are on Y. It has its own domains it handles. I do not have a mailertable file either (well, I do but, nothing is in there). > > Are you sure that server X (your backup MX as I understand your post) is > configured to allow relaying for all your domains listed on server Y? In > other words - if server Y has 3 domains listed for local delivery > (/etc/mail/local-host-names), then server X (your backup MX) would not > list > these domains as local, but rather list them as domains accepted for > relaying to the primary MX when spammers deliberately connect to the > backup > MX first. > > Example: On server X (your backup MX) > > # cat /etc/mail/local-host-names > > # cat /etc/mail/relay-domains > Domain1.com > Domain2.com > Domain3.com > > # cat /etc/mail/mailertable > Domain1.com esmtp:[primary_mx.mydomain1.com] > Domain2.com esmtp:[primary_mx.mydomain2.com] > Domain3.com esmtp:[primary_mx.mydomain3.com] > > FWIW: Running a backup MX introduces a whole set of new problems. The main > one being keeping the backup MX's configuration regarding what is > accetped/rejected/relayed/rbl's identical to that of the primary MX. In > addition, the backup MX must be bale to lookup (like with LDAP) or contain > a > list of valid mailboxes on the primary MX so that, it too, can reject > attempts to deliver e-mail to unknown accounts instead of generating a DSN > back to a non-existant account. Thus clogging up your queues. > > Steve Cowles > > > -- > fedora-list mailing list > fedora-list@xxxxxxxxxx > To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list >
