FlyerTalk Forums - View Single Post - Verizon is blocking all incoming e-mail from outside the USA!!!
Old Jan 21, 05, 5:22 am
Join Date: Dec 2001
Posts: 875
Originally Posted by stimpy
Like I said above, send me your Verizon email account and I will send you foreign email so you can see that it works fine. There are plenty of Flyertalkers from outside the US who can do the same. As long as the mail comes from a reputable source that doesn't forward a ton of spam to Verizon, it will work fine.

What is the name of the source domains in the UK and Scandinavia that have problems sending to you? Tell us and maybe we can help you debug the problem.
Sorry Stimpy - this is complete rubbish. I run my own mailservers. I run some of the strongest spam filtering available on my servers. I have worked professionally in internet security for about ten years. In the past I was the product manager for the UK's third largest ISP and subsequently their senior technical consultant for special projects. I've set up mail servers for major international manufacturers, banks, software houses and stockbrokers.

None of the servers I run are open relays. None of the servers I run have ever sent a single spam email. None of the servers I run nor the domains they run are blacklisted anywhere nor have they ever been.

I am still unable to send email to Verizon subscribers. Take a look at my headers in this bounce message from last night.

The problem;

Received: from localhost (localhost)
by (8.12.11/8.12.11) id j0KL90RZ002948;
Thu, 20 Jan 2005 21:09:12 GMT
Date: Thu, 20 Jan 2005 21:09:12 GMT
From: Mail Delivery Subsystem <MAILER-DAEMON>
Message-Id: <[email protected] >
To: <[email protected]>
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
Subject: Warning: could not send message for past 4 hours
Auto-Submitted: auto-generated (warning-timeout)
Content-Length: 2412

This is a MIME-encapsulated message



The original message was received at Thu, 20 Jan 2005 17:08:30 GMT
from espresso []

----- Transcript of session follows -----
... while talking to
<<< 421 SMTP service not available, closing transmission channel
<[email protected]>... Deferred: 421 SMTP service not available, closing
transmission channel
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old

Content-Type: message/delivery-status
Content-Type: message/delivery-status

Reporting-MTA: dns;
Arrival-Date: Thu, 20 Jan 2005 17:08:30 GMT

Final-Recipient: RFC822; [email protected]
Action: delayed
Status: 4.5.0
Diagnostic-Code: SMTP;
Last-Attempt-Date: Thu, 20 Jan 2005 21:09:12 GMT
Will-Retry-Until: Tue, 25 Jan 2005 17:08:30 GMT
My network setup;
  • is a Sun SPARC running Sendmail using nine DNSBLs and one RHSBL. It will only relay from localhost.
  • ( is a standalone enterprise grade firewall (but for security reasons I'm not going to tell you what it is) that provides both outbound and inbound SMTP proxying and NAT for the two mail servers I run on site.
  • The mail servers are visible externally as ( and (
  • runs on a reserved IP address of and runs on a reserved IP address of
  • I can send email from a number of domains including .com, .org and but they are all rejected by
So Stimpy, it's time to put your money where your mouth is. Can you tell me why I am not a reputable source and can you debug my problem?

Note to mods; I am perfectly happy for my email address to appear in this posting - I don't have a spam problem and it might help Stimpy to debug my problem.
SarahWest is offline