> Rafael Azevedo - IAGENTE: >> I was watching my log files now looking for deferred errors, and >> for my surprise, we got temporary blocked by Yahoo on some SMTPs >> (ips), as shown: >> >> Jan 9 13:20:52 mxcluster yahoo/smtp[8593]: 6731A13A2D956: host >> mta5.am0.yahoodns.net[98.136.216.25] refused to talk to me: 421 >> 4.7.0 [TS02] Messages from X.X.X.X temporarily deferred - 4.16.56.1; >> see http://postmaster.yahoo.com/errors/421-ts02.html > > As required by RFC the Postfix SMTP client will try another MX > host when it receives a 4xx greeting. > > Postfix limits the number of MX hosts to try. > > When all greetings fail with 4xx or whatever then Postfix will > suspend deliveries.
I have no idea about what I'm doing wrong, this really doesn't happen in my servers. In my case, postfix keeps trying to deliver even the messages on active queue to the same destination, not mentioning the deferred queue that never stops sending after getting this error. I mean, postfix gets the next message (not considering the destination) and tries again and again. > > Therefore, you are talking out of your exhaust pipe when you > claim that Postfix keeps trying. Sorry, my english is not that good, I didn't understand what you mean. - Rafael
