SPF with Alternate-port SMTP?

If you are creating an SPF record for your domain that uses Alternate-port SMTP, simply add this token to your SPF string: include:no-ip.com. This way, if the IP address of smtp-auth.no-ip.com ever changes, your SPF record will remain valid.

An example SPF record (and one you can use) is: v=spf1 include:no-ip.com -all

Did this answer your question? If not don’t hesitate to contact our support team for additional assistance.