* USM Bish <[EMAIL PROTECTED]> [20070425 20:43]: > IIRC, usually greylisting involves sending Err Code 451 (viz > Requested action aborted: local error in processing). Since > this implies that ATRN request cannot be processed now, or a > temporary failure, most modern MTAs resend the mail on receipt > of Err 451. > > OTOH, Err Code 450 is "Request mail action not taken: mailbox > unavailable" (which is perhaps what you mean by saying "user > not active now"). This is a serious error, and indicates ATRN > request has been *refused*. MTAs compliant with RFC 822, > should not respond this.
That's wrong. Every 4xx code is considered a temporary error, and sending MTAs /should/ retry, but they are not required to do so. Only the 5xx codes are used for permanent errors and indicate that the sender must not retry the same transaction. Regards, Felix -- Felix M. Palmen (Zirias) \ -PGP- <[EMAIL PROTECTED]> /"\ ASCII Ribbon web: http://zirias.ath.cx/ \ http://zirias.ath.cx/pub.txt \ / Campaign my open source projects: \ FP ED9B 62D0 BE39 32F9 2488 X Against HTML In http://zirias.ath.cx/?pg=pro \ 5D0C 8177 9D80 5ECF F683 / \ Mail And News
signature.asc
Description: Digital signature
-- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
