What does a "Reason: 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)" error mean when an email message bounces back to the sender?

 

 

 

The following error will be bounced back to a sender if the email address the sender is trying to send to is not fully activated:

 

"Reason: 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)"

 

This usually occurs when:

 

1. The domain name contained in the email address (being sent to) has not fully propagated yet.

 

Domain propagation is the process where Internet Service Providers (ISPs) around the world automatically update their records (DNS tables) to reflect the new domain or to reflect a change in the hosting provider for the domain name. Once the changes have been made, the domain's website and email services will be activated. Please note that full domain propagation can take between 24-72 hours. To verify when your domain was last updated, we suggest that you conduct a whois on your domain. A popular whois tool is located here: http://www.allwhois.com.

 

OR

 

2. Your POP mail client (ie. Outlook) is not configured properly. We suggest the following: 

Solution: For SMTP port number setting, use port 25 instead and "de-select" the option "My outgoing server requires authentication". But if the problem persists (this will be the case for a minority of e-mail  users), then "select" the option "My outgoing server(SMTP) requires authentication" as well.

 

IMPORTANT: Also ensure you are using your full email address as your username.  There were recent security changes made to ensure no unauthorized email access is used.


 

Was this answer helpful?

 Print this Article

Also Read

Getting Rid of Spam!

Spam has become ubiquitous - one of the facts of life, like taxes. Until strong anti-spam laws...

Mail settings for Outlook on the new Xenon Server

There are several mail servers that are available to you on the new Xenon Server Cluster.Here are...

Unable to get emails to AOL addresses

It is the experience of Argon Hosting as well as our respective datacenters that AOL does not...

Why do emails bounce?

In computer jargon, a bounced e-mail is one that never arrives in the recipient's inbox and is...

What type of spam protection is in place on the servers?

We provide real-time maps protection through the Spamhaus project. We also offer spamassassin...