Subj : Fwd: Re: [Weasel] 450 Errors In Weasel Pro To : robert wolfe From : mark lewis Date : Tue Mar 17 2015 17:54:36 * Forwarded (from: personal) by mark lewis using timEd/2 1.10.y2k+. * Originally from waldo kitty (1:3634/1000) to mark lewis (1:3634/12). * Original dated: Tue Mar 17, 13:24 -------- Forwarded Message -------- Subject: Re: [Weasel] 450 Errors In Weasel Pro Date: Sun, 15 Mar 2015 22:46:42 -0700 From: Steven Levine Reply-To: weasel-list@os2voice.org To: weasel-list@os2voice.org In <550664ED.9020001@pmoylan.org>, on 03/16/15 at 04:06 PM, Peter Moylan said: Hi Peter, >The "return path not verifiable" usually means that the receiving server >is trying to check that the claimed sender's address is a genuine mail >account. Typically it does this by starting a "send mail" transaction to >the address named in the MAIL FROM command, but aborting it before >actually sending anything. If this attempt fails, it concludes that the >send in the MAIL FROM command is a fake. Is this still true for a significant number of today's MTAs? I was under the impression that these days most use SPF or one of its successors. >In this case, though, it appears to be checking the _recipient's_ >address (robert.wolfe@winserver.us), and discovering that winserver.us >will not accept mail for robert.wolfe. I don't read it this way. As I read the logs, it is the comcast mailserver that is rejecting the MAIL FROM with a 450. Reading between the lines, the MAIL FROM is foo@os2bbs.org and the RCPT TO is robert.wolfe@winserver.us. >Maybe we need to see a longer section of the log to work this out. We also need to know what the senders MX record looks like. If we assume that mail.os2bbs.org is the mx then the reject make sense if the comcast mail server does SPF validation. Steven -- ---------------------------------------------------------------------- "Steven Levine" Warp/DIY/eComStation etc. www.scoug.com ---------------------------------------------------------------------- -- This email was Anti Virus checked by Astaro Security Gateway. http://www.astaro.com ----------- To unsubscribe yourself from this list, send the following message to MajorMajor@os2voice.org unsubscribe weasel-list end -- This email was Anti Virus checked by Astaro Security Gateway. http://www.astaro.com * Origin: (1:3634/12) .