DeskNow Knowledge Base
 
      
Home Mail Delivery errors 450 Recipient address rejected: Try again later

450 Recipient address rejected: Try again later

This is a common response message coming from mail servers that implement an antispam measure called greylisting.

The server rejects a connection the first time. A spammer will not bother retrying later, but honest servers will. The second connection will be accepted. For more details, see http://en.wikipedia.org/wiki/Greylisting


As stated in the message, DeskNow will retry later, and the email delivery will typically succeed (if it does not, DeskNow will try again a few times, and if even the last attempt fails, DeskNow will send a second bounce message stating that the error is permanent).

If you do not want to receive these warnings, you can disable them by unchecking the option Administration/Mail/SMTP Outgoing/Delivery attempts/Send delivery error notification for first attempt.

Email Article Email
Print Article Print


How helpful was this article to you?
Related Articles
article 550 MAIL FROM local domain, but you're not authorized to relay. Suspected address spoofing. Command rejected.
This message is generated by DeskNow. This...

  August 14, 2006    Views: 23337   
article Helo command rejected: need fully-qualified hostname
This is another case of this error:...

  May 27, 2004    Views: 109945   
article 550 5.7.1 Sender address not valid
See this article:...

  August 23, 2004    Views: 43565   



Powered by Lore :: (c)2003 Pineapple Technologies.