nanog mailing list archives
Re: SMTP no-such-user issues
From: Steve Bertrand <steve () ibctech ca>
Date: Tue, 17 Jun 2008 09:20:12 -0400
Steve Bertrand wrote:
Frank Bulk - iNAME wrote:Once you've performed a full capture on port 25, Wireshark does a nice jobof providing an option to extract the relevant conversation by right-clicking on just one packet in that conversation and choosingsomething called "Follow the TCP stream", I believe.Ok. I've never captured in tcpdump and then imported into Wireshark before, but I'll do some tests, scp the file to my Windows workstation, then follow the stream.Once I ensure I get a clean stream, I'll post the results.
As I research the documentation on the how-to specifics on capturing with tcpdump in a format that is Wireshark compatible, is there anyone here that could perform a simple test against their own domain email system, that can confirm or deny what I have been witnessing?
If it can be confirmed that either A) my end is broken, or B) a remote end is broken, I will be content, and can continue with other work.
My mind will rest at ease if someone, with known bounce-no-mbox enabled, can:
- provide me off list (or test for themselves from a remote location) a list of valid, and invalid recipients within their own domain's email infrastructure. It doesn't even matter if you specify which are valid and which ones are not
- create a temporary account on Hotmail (or from a sympatico.ca email address, using whatever outbound servers they specify) send a message to the same recipients as requested above.
- in the case that you don't want to provide the addresses, and want to test internally, inform me of the overall result
- in the case that I receive the addresses to test from my location, provide me with the results of the Hotmail test so I can compare results
If this is happening to other ops along with myself, I can justify it to my users, and I can justify it in my own mind. If this is a locale specific issue to my own network, then I need to know that, as I obviously have work to do.
Thanks to everyone again. Steve
Current thread:
- SMTP no-such-user issues Steve Bertrand (Jun 16)
- Re: SMTP no-such-user issues Steve Bertrand (Jun 17)
- RE: SMTP no-such-user issues Frank Bulk - iNAME (Jun 17)
- Re: SMTP no-such-user issues Steve Bertrand (Jun 17)
- RE: SMTP no-such-user issues Frank Bulk - iNAME (Jun 17)
- Re: SMTP no-such-user issues Steve Bertrand (Jun 17)
- Re: SMTP no-such-user issues Steve Bertrand (Jun 17)
- Re: SMTP no-such-user issues Nathan Ward (Jun 17)
- Re: SMTP no-such-user issues Steve Bertrand (Jun 17)
- Message not available
- Re: SMTP no-such-user issues Steve Bertrand (Jun 17)
- Re: SMTP no-such-user issues Steve Bertrand (Jun 17)
- RE: SMTP no-such-user issues Frank Bulk - iNAME (Jun 17)
- Re: SMTP no-such-user issues Steve Bertrand (Jun 17)