Way to go, Linda! Darin.
----- Original Message ----- From: Katie LaSalle-Lowery To: [email protected] Sent: Tuesday, January 09, 2007 7:21 PM Subject: RE: [IMail Forum] Verizon 450 action not taken I am happy to report resolution!!! Just as a shot in the dark I asked Linda at Declude (with whom I was communicating about a backlog in the Declude proc folder we had yesterday) if she had seen the issue before. She said that she had seen similar and shared some contact info for an email specialist and an email supervisor at Verizon. I called and left voicemail for both and received a return call from a Brian this afternoon. Brian explained the sender verification call back that the Verizon servers do to eliminate receiving email from spoofed addresses that don't exist. If, for example, their servers receive a mail from [EMAIL PROTECTED] they will do an MX lookup then connect to the sending server and see if it will accept mail from the sending address. So, if mail.centric.net says that [EMAIL PROTECTED] is not a valid recipient the Verizon server concludes that the mail is spoofed and rejects it. Brian then told me the IP addresses of the servers that perform the sender verification call back. I recognized them immediately. About 3-4 weeks ago we suffered a massive dictionary attack from those addresses that almost overwhelmed us and added them to the Control Access List. Brian said that if they got hit with a huge amount of spam with spoofed addresses on the centric.net domain and were failing a bunch of sender verification callbacks it would look exactly like a dictionary attack from this side. So, I removed the IP's from the Control Access List and Brian said to keep his contact info. Problem solved and I "made contact" with the impossible folks to make contact with. Thanks, Katie -------------------------------------------------------------------------------- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Marc Catuogno Sent: Tuesday, January 09, 2007 12:36 PM To: [email protected] Subject: RE: [IMail Forum] Verizon 450 action not taken I had the same exact problem with them. The problem eventually resolved itself, but you need to have some type of Verizon account to get anywhere with them. Do you or any of your customers have a Verizon account? Marc -------------------------------------------------------------------------------- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Katie LaSalle-Lowery Sent: Tuesday, January 09, 2007 2:29 PM To: [email protected] Subject: [IMail Forum] Verizon 450 action not taken Hello, When I Google my problem I see thousands of reports of the same but nothing specific to our setup (Imail 8.05, Declude, Simple DNS Plus). Any insight would be appreciated. My problem is this (which is a copy & paste of part of an email I sent to [EMAIL PROTECTED]): For about two weeks the verizon.net mail servers have been refusing relays from our mail server. Here is an example log snippet: 01:03 20:47 SMTP-(3EFC3D80) Trying verizon.net (0) 01:03 20:47 SMTP-(3EFC3D80) Connect verizon.net [206.46.232.11:25] (1) 01:03 20:47 SMTP-(3EFC3D80) 220 sv18pub.verizon.net MailPass SMTP server v1.2.0 - 112105154401JY+PrW ready Wed, 3 Jan 2007 21:47:56 -0600 01:03 20:47 SMTP-(3EFC3D80) >EHLO mail.mtwi.net 01:03 20:47 SMTP-(3EFC3D80) 250-sv18pub.verizon.net 01:03 20:47 SMTP-(3EFC3D80) 250-8BITMIME 01:03 20:47 SMTP-(3EFC3D80) 250 SIZE 20971520 01:03 20:47 SMTP-(3EFC3D80) >MAIL FROM:<[EMAIL PROTECTED]> 01:03 20:47 SMTP-(3EFC3D80) 450 Requested mail action not taken-Try later:sv18pub.verizon.net 01:03 20:47 SMTP-(3EFC3D80) SMTP_DELIV_FAILED 01:03 20:47 SMTP-(3EFC3D80) >QUIT I have attempted to create a trouble report through online chat. The support staff there referred me to your whitelist form -- a step I had already taken. I have submitted the whitelist form entering both of the IP addresses assigned to our mail server (69.51.66.5 & 69.51.66.6) and multiple domain names hosted on that server (eg centric.net and mtwi.net). I have made four or more submissions and received, in every case, a response saying that our IP is not blocked. I advised the online chat support staff of that and they then said they were not able to help me further. I requested that the the problem report be escalated to staff that could assist and was informed that the online support staff have no means by which to do so. All of your phone support contacts do not allow a caller to proceed without an account number. Thank you, Katie LaSalle-Lowery Centric Internet Services 1410 Reserve St. Missoula, MT 59801 Local Phone 549-3337 ext. 21 Toll Free (888)593-2776 ext. 21 Fax (406)721-3438
