The Boston Diaries

The ongoing saga of a programmer who doesn't live in Boston, nor does he even like Boston, but yet named his weblog/journal “The Boston Diaries.”

Go figure.

Wednesday, Debtember 07, 2005

We're just a conduit

One of our customers sent in a ticket complaining about not receiving email:

I sent myself an email to [customer's email address at their ISP] and it came back in less than 5 secs.

I sent myself an email to [customer's email address on our server] and it NEVER came back.

What is happening?

I checked the mail logs and they didn't show anything. I then sent email to the customer's address on our server, and got the following back:

To: <support@XXXXXXXXXXX>
Subject: Returned mail: see transcript for details
Date: Wed, 7 Dec 2005 12:52:12 -0500

The original message was received at Wed, 7 Dec 2005 12:52:11 -0500 from root@localhost

   ----- The following addresses had permanent fatal errors -----
[address to customer's ISP]
(reason: 550-[our server IP address] blocked by ldap:ou=rblmx,dc=XXXXXXX,dc=XXX) (expanded from: <XXXXXXXXXXXXXXXXXXXXXXXXX>) ----- Transcript of session follows ----- ... while talking to XXXXXXXXXXXXXXXXXXXXX.: >>> MAIL From:<support@XXXXXXXXXXX> SIZE=1311 <<< 550-[our server IP address] blocked by ldap:ou=rblmx,dc=XXXXXXX,dc=XXX <<< 550 Blocked for abuse. Please send blacklist removal requests to XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - Be sure to include your mail server IP ADDRESS. 554 5.0.0 Service unavailable

This is a major problem.

Basically, our customer's ISP is blocking our server because it sent too much spam to towards our customer's ISP. Well, yes, because it's forwarding email, including all the spam. So of course it's going to look like our server is spamming.

I could write to XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX and say that this is a shared webhosting server and that we'll filter for spam and sorry about that, but we're already filtering spam for this client (although apparently not filtering enough). And even if they remove our server, there's no guarentee that sometime in the future they won't block our server due to excessive levels of spam coming from our server (because spam never stops).

Well, I'll write to the address anyway and profusely apologize and all that, and hope they'll remove the block.


Obligatory Picture

[“I am NOT a number, I am … a Q-CODE!”]

Obligatory Contact Info

Obligatory Feeds

Obligatory Links

Obligatory Miscellaneous

You have my permission to link freely to any entry here. Go ahead, I won't bite. I promise.

The dates are the permanent links to that day's entries (or entry, if there is only one entry). The titles are the permanent links to that entry only. The format for the links are simple: Start with the base link for this site:, then add the date you are interested in, say 2000/08/01, so that would make the final URL:

You can also specify the entire month by leaving off the day portion. You can even select an arbitrary portion of time.

You may also note subtle shading of the links and that's intentional: the “closer” the link is (relative to the page) the “brighter” it appears. It's an experiment in using color shading to denote the distance a link is from here. If you don't notice it, don't worry; it's not all that important.

It is assumed that every brand name, slogan, corporate name, symbol, design element, et cetera mentioned in these pages is a protected and/or trademarked entity, the sole property of its owner(s), and acknowledgement of this status is implied.

Copyright © 1999-2024 by Sean Conner. All Rights Reserved.