Horde Webmail not able to send.

[Tsi-Shawn]

Today my clients are not able to send mail via webmail. The message below is received no matter what email address is placed in the To: field.

There was an error sending your message: Message could not be delivered - the address was not found, is unknown, or is not receiving messages.


I have re-started all services. Note that they are able to send via outlook. Seems to just be webmail.

Running:
OS Microsoft Windows Server 2012
Plesk version 12.0.18 Update #30, last updated at Dec 26, 2014 03:35 AM

 

[IgorG]

First of all try to troubleshoot this issue in logs with help of this article - http://kb.odin.com/en/111289