Mail Routing Problem

Hello.

I have a difficult and unusual mail rouing problem that I have not
been able to solve. While I realize this is not exactly the correct
group to be asking in, from reading the postings you guys are very
good at solving mail routing problems.

If you'd like to take a crack at it, here is the scenario:

I am a comcast.net user. I have my own domain which is neteast.com.
The neteast.com domain is parked at EasyDNS (www.easydns.com) which
also handles my DNS records. For neteast domain email, I have
mailmaps at EasyDNS that map back to my Comcast email addresses.

I set up Lyris ListManager 9.1 (www.lyris.com) to test out listerv
functionality.

The listserv works great except it cannot send email from the list to
either neteast.com or comcast.net addresses. This is true for any
address in these domains. It can send to every other domain I tested.

Here is a log failure entry for a sample neteast.com recipient:

Wed, 03 Jan 2007 18:33:35 Sending email to: howard@xxxxxxxxxxx
<-- DNS info available for: neteast.com
--> Attempting to connect to: neteast.com (205.210.42.52 25)
<-- Connected to: neteast.com (205.210.42.52 25)
<-- 220 storm.easydns.com ESMTP spoken here.
--> HELO mail.neteast.com
<-- 250 storm.easydns.com
--> MAIL FROM: bounce-60-8@xxxxxxxxxxxxxxxx
<-- 250 Ok
--> RCPT TO:<howard@xxxxxxxxxxx>
<-- 571 <c-69-140-35-107.hsd1.md.comcast.net[69.140.35.107]>: Client
host rejected: dialup/DSL/cable host, please use your ISP's SMTP
server

Here is a log failure entry for a sample message comcast.net
recipient:

Wed, 03 Jan 2007 18:33:34 Sending email to: howard100@xxxxxxxxxxx
<-- DNS info available for: comcast.net
--> Attempting to connect to: comcast.net (206.18.177.26 25)
<-- Connected to: comcast.net (206.18.177.26 25)
<-- 220 alnrmxc19.comcast.net - Maillennium ESMTP/MULTIBOX alnrmxc19
#122
--> HELO mail.neteast.com
<-- 250 alnrmxc19.comcast.net
--> MAIL FROM: bounce-60-10@xxxxxxxxxxxxxxxx
<-- 550 69.140.35.107 blocked by ldap:ou=rblmx,dc=comcast,dc=net ->
Comcast.net subscribers are not permitted to directly connect to this
mail server. If you are a Comcast Commercial Services customer and
need support, please contact support_biz@xxxxxxxxxxxxxxxxx

In theory, all outgoing SMTP traffic from the listserv should be going
to EasyDNS.

My guess is that Comcast is recognizing my IP address as one of their
own and is intercepting the outgoing mail and routing it internally.

Comcast says it's not their problem. They fault EasyDNS. EasyDNS
claims its a Comcast problem.

Does anyone have a solution or a workaround?

Direct replies would be appreciated to howard@xxxxxxxxxxx

Thanks.
.

Relevant Pages

  • Re: Mail Routing Problem
    ... I couldn't follow all of it but the DNS is provided by EasyDNS and not mail routing? ... From what I can tell, the issue is Comcast is detecting neteast.com resolves to a cable IP, which some mail servers will automatically deny routing. ... Is port 25 blocked on your server setup with Lyris. ...
    (microsoft.public.inetserver.iis.smtp_nntp)
  • Re: how to identify mail server availabitlity for a PC on cable?
    ... with some custom features for a personal computer that uses comcast cable. ... also does not have MS Office loaded - otherwise I would open Outlook and see ... server from my dsl provider which is the same mail server that my Outlook is ... Also if your client is using gmail then you could use gmails servers.I ...
    (microsoft.public.dotnet.languages.csharp)
  • Re: how to identify mail server availabitlity for a PC on cable?
    ... with some custom features for a personal computer that uses comcast cable. ... server from my dsl provider which is the same mail server that my Outlook ...
    (microsoft.public.dotnet.languages.csharp)
  • RE: how to identify mail server availabitlity for a PC on cable?
    ... load Outlook and run the wizard (which is what I meant by Outlook finding the ... I have dsl at my house. ... I can enter my dsl mail server and the app sends emails ... But my friend also has comcast - is ...
    (microsoft.public.dotnet.languages.csharp)
  • Re: wireless connection for email
    ... Using 465 for Outgoing Mail Server. ... My laptop user has a comcast cable email account which she uses from home. ... If she has to use another smtp server, can she use her wireless connection to ...
    (microsoft.public.windows.inetexplorer.ie6_outlookexpress)