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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Apologies but...Verizon Postmaster?
On Fri, 21 Nov 2003, Charles Sprickman wrote: > On Fri, 21 Nov 2003, Jay Hennigan wrote: > > > In our case it's at the IP level. Our mailserver gets "connection refused" > > from their "business" mail servers at "bizmailsrvcs.net". We got someone > > on the phone who was supposed to look into it a week or so ago. > > Have a look at the logs on your primary MX. Part of their "anti-spam" > solution seems to be a connection back to your primary MXer to check if > the envelope from is valid or not. If you don't reply in the (very short) > timeout period, the mail is rejected with a *permanent* failure. Hmmm... Our primary MX is Postini. And they won't even open a socket on TCP 25 so we don't get far enough to give them an envelope from. beach% telnet mta1.bizmailsrvcs.net 25 Trying 206.46.164.22... Connected to mta1.bizmailsrvcs.net. Escape character is '^]'. 421 oe-mp1.bizmailsrvcs.net connection refused from [199.201.128.19] Connection closed by foreign host. What's weird is that any random dialup or DSL can connect to them just fine. It seems like they've put our mail sender in a local blacklist but we truly hate and kill what few spammers crop up here on sight. > It's a horrible design. It's useless for them on MTAs that just accept > everything into the queue and work it from there (qmail, ?) and a pain to > the sender if you happen to have your primary mx swamped in a spam attack > when they try to query it. From what I can see, the timeout is *very* > short and they do not try anything other than the primary mxer. I think it's two different issues, as ours is at a lower level. -- Jay Hennigan - CCIE #7880 - Network Administration - [email protected] WestNet: Connecting you to the planet. 805 884-6323 WB6RDV NetLojix Communications, Inc. - http://www.netlojix.com/
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