>> It depends on MTA. From the log, AOL may not use Postifx or customized the >> checking on RCPT_TO stage (PolicyD or milter, etc). >> >> However, the result is that AOL MTA don't accept it for your MAIL FROM, RCPT >> TO parameters. > > http://postmaster.aol.com/Postmaster.Errors.php > > The AOL MTA rejects it because the mailbox does not exist. A policy > rejection results in a different return code.
I originally started this thread because I received several "Recipient address rejected" bounces from different aol.com addresses in the last 24 hours. I have just now received this: Final-Recipient: rfc822;mas...@aol.com Action: delayed Status: 4.0.0 (temporary failure) Diagnostic-Code: smtp; 4.3.2 - Not accepting messages at this time 554-'5.7.1 : (RLY:B1) http://postmaster.info.aol.com/errors/554rlyb1.html' (delivery attempts: 0) That URL says the following which does sound like a policy violation: "This error message is a dynamic block on our system. Dynamic blocks are placed on an IP address when the IP's statistics break our threshold. These are automated blocks that are removed by the system within 24 hours once the complaints are again below the threshold." Could "statistics" refer to the several messages sent from my IP address to non-existent aol.com addresses within the last 24 hours? - Grant >> > Does this mean the email address doesn't exist? >> > >> > <exam...@aol.com>: host mailin-04.mx.aol.com[64.12.138.161] said: 550 5.1.1 >> > <exam...@aol.com>: Recipient address rejected: aol.com (in reply to >> > RCPT TO command) >> >> >> Yes, it should mean exactly that; >> http://tools.ietf.org/html/rfc3463#section-3.2 >> >> X.1.1 Bad destination mailbox address >> >> The mailbox specified in the address does not exist. For >> Internet mail names, this means the address portion to the left >> of the "@" sign is invalid. This code is only useful for >> permanent failures. >> >> Mvg, >> Joni
