It means that the IP address in question (199.144.155.166) has no RDNS entry, and the mail server is set to check RDNS:
C:\>nslookup 199.144.155.166 Server: karen.arisiasoft.com Address: 216.201.36.227 *** karen.arisiasoft.com can't find 199.144.155.166: Non-existent domain At 12:17 7/21/2003, Michael Lugassy wrote: >Hi there, > >Anyone knows what that error means, and how can I avoid this error? > >==================================== > >[<02>] The reason of the delivery failure was: > >552 I do not accept mail from unknown IP 199.144.155.166, please correct >your reverse DNS > >[<04>] Here is listed the message log file: > >[PeekTime] 1058781681 : Mon, 21 Jul 2003 12:01:21 +0200 ><< >ErrCode = -82 >ErrString = [RCPT TO:] not permitted by remote SMTP server >ErrInfo = 552 I do not accept mail from unknown IP 199.144.155.166, please >correct your reverse DNS >SMAIL SMTP-Send MX = "email1.atc.cz." SMTP = "mail.mymailserver.co.il" From >= "[EMAIL PROTECTED]" To = "[EMAIL PROTECTED]" Failed ! >SMTP-Error = "552 I do not accept mail from unknown IP 199.144.155.166, >please correct your reverse DNS" >SMTP-Server = "email1.atc.cz." > >> > > >- >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] - 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]
