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Old 23 May 2018, 10:17 PM   #1
ewal
Master of the @
 
Join Date: Apr 2002
Location: West Sussex, UK
Posts: 1,334
spamrl

Appreciate if someone could let me know what is happening here please.

Sent an email to a contact of mine and received back the following error (I've ***'ed the email address for privacy reasons).


Quote:
<c***@s****.com>: host mx1.spamwall.co.uk[82.221.110.2] said: 550 A URL in this email (fastmailusercontent . com) is listed on https://spamrl.com/. Please resolve and retry (in reply to end of DATA command)

The MX record for s****.com is mx1.spamwall.co.uk. It looks like fastmailusercontent.com is being blacklisted. Am I correct?

How can I resolve this? Or is it down to Fastmail?

cheers
E

Last edited by ewal : 23 May 2018 at 10:18 PM. Reason: typo
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Old 24 May 2018, 01:06 AM   #2
BritTim
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Join Date: May 2003
Location: mostly in Thailand
Posts: 3,084
The message should mean that fastmailusercontent.com is on the Spamhaus DBL (domain blocklist). However, I just did a check at https://www.spamhaus.org/lookup/ and that domain is not on the DBL. I suggest retrying the sending of your message. I suspect it was a short term issue (possibly even an error by Spamhaus). If the message is still failing, open a support ticket.
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Old 24 May 2018, 06:12 AM   #3
ewal
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Join Date: Apr 2002
Location: West Sussex, UK
Posts: 1,334
Quote:
Originally Posted by BritTim View Post
The message should mean that fastmailusercontent.com is on the Spamhaus DBL (domain blocklist). However, I just did a check at https://www.spamhaus.org/lookup/ and that domain is not on the DBL. I suggest retrying the sending of your message. I suspect it was a short term issue (possibly even an error by Spamhaus). If the message is still failing, open a support ticket.
Cheers

I subsequently sent the email and redacted all references to fastmailusercontent.com (arose due to an attachment from a previous email in the same thread) and message went through just fine.


I assume Fastmail have a process of catching when their domains and/or IP address ranges get on spamlists and take appropriate actions. So I won't bother annoying them with a ticket.

Luckily the MX server sent me a fail message so I could take action. One has to wonder how many MX servers don't bother and simply discard messages based on blacklists.
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