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.


 

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