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Knowledge Base

Branded POP/SMTP/IMAP Server Names

Many email service administrators would like to be able to use branded server names for their POP, SMTP, and IMAP servers. This is an option for domains where a CNAME record can be created and maintained. Only the domain owner or the DNS host has the ability to make CNAME updates.

A fully branded server name is not available to domains that have been registered through nor domains in which the DNS is hosted by

Please verify with your host that they can create and maintain the following CNAME settings: IN CNAME IN CNAME IN CNAME

In the future, your HOST will be responsible to maintain this CNAME setting. If this server becomes unavailable in the future, please work with your host.

With these settings, your end-users can use your fully-branded server names when configuring POP/SMTP/IMAP or use the default server names.

For troubleshooting, you can go to and check the CNAME update at any time.

Go to the top-right section under DNS LookUp. Type "" and select "CNAME". Then hit LookUp. We suggest that you run this test a few times in succession to verify that the CNAME record is pointed correctly to "". Repeat for and

SSL does not support the use of SSL ports with custom CNAME entries. Any user attempting to enable SSL will receive certificate warnings indicating the server name does not match.