Mail returned, error "No mail server"

When attempting to send mail to a user or distribution list I recieve the following bounce messag:

The following recipient(s) could not be reached:

Error Type: SMTP

Error Description: No mail server

Additional information: No mail servers exists for the address.


This error can occur for several reasons. First closely check the address returned in the bounce message. From time to time certain mail clients will incorrectly autofill a to: field in an email message with an email address surrounded by quotation marks. For example"


The following recipient(s) could not be reached:




When Hmail attempts to process this message it will use this single quote as a portion of the mail server address that it's attempting to resolve. While is a valid and properly resolving mail domain,' is not, therefore the mail will bounce with the "no mail server exists" message.


Similarly if you are attempting to send to a distribution list or other list which may include email address that have a trailing space or tab entry after them this error will occur. You can verify this by double clicking the address in the error message. Any additional spaces or tab entries after the mail address will be included within the highlighted email address.


You may also get this error if you have accounts setup with forwards if the forward field contains multiple email addresses. For example, if you have a forward configured on an existing Hmail account formatted as,


Hmail will record everything after the first @ sign as the "domain" portion of the message. Forwards within Hmail are one to one mappings, meaning that one account can ONLY forward to one other account. You can read more about forwards here:


Finally, you may recieve this error message if the email address you are attempting to send to does not have a properly configured MX record, or the domain is expired or not registered.  


Article ID: 534, Created On: 5/22/2007, Modified: 6/9/2009

Feedback (0)