On Tue, 28 Jan 2003, Louis Solomon [SteelBytes] wrote: > > an email that was sent to my backup MX generated a "Mail loop detected" > error on the backup MX. > > here's the setup (using v1.11 on win2000) ... > > DNS MX records: > domain1.com -> 10:alias.domain1.com, 20:alias.domain2.com > domain1.com xmail settings: > domain -> domain1.com > domain alias -> alias.domain1.com > domain2.com xmail settings: > custdomain -> domain1.com.tab: "SMTP"<newline>, alias.domain1.com.tab: > "SMTP"<newline> > (plus settings pertaining to domain2.com, but they should not be > relevant, but for those who are interested, they are almost the same as for > domain1.com). > > I tested this by telneting to domain1.com:25 and domain2.com:25 and sending > a message by hand (which got through both times ok). > so I thought my backup MX was all ok. > > but for a short amount of time on the weekend, domain1.com was offline, and > an email was sent to [EMAIL PROTECTED] > now, here is what I think happened .... > > remote server does > MX lookup for domain1.com -> gets 10:alias.domain1.com, > 20:alias.domain2.com > attempts to connect to domain1.com:25 -> fails > attempts to connect to domain2.com:25 -> succeeds > domain2.com does > check local domains and domain aliases -> no match > check custdomain -> finds command "SMTP" for domain1.com > MX lookup for domain1.com -> gets 10:alias.domain1.com, > 20:alias.domain2.com > attempts to connect to domain1.com:25 -> fails > attempts to connect to domain2.com:25 -> succeeds > domain2.com does the same sequence of steps repeatedly until loop detected. > (each time prepending a bit to the header) > > so, have I just setup my backup MX wrong ? (I thought this is how it was > supposted to be setup according to a recent post on this list)
You should use an "smtprelay" instead of an "smtp" - Davide - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
