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What is whitelisting?

Whitelisting is a way of ensuring that your recipient server doesn’t block emails as spam when sent from the same domain.

Sometimes, if you are sending from your domain through an SMTP server to the same domain, the recipient server may consider the emails to be spoofed and may place them in a spam folder, or else prevent them from reaching you altogether. By whitelisting, you avoid this issue as well as bypassing any unnecessary spam filters, and blacklist checks. Since you’re sending from your own domain to your own domain, the emails should be trusted.

So how do I whitelist?

If you’re sending through our servers, we recommend whitelisting our outgoing IP addresses with your incoming (MX) mail server. If you’re unsure of the process, we recommend speaking to your domain host as they should be able to do this for you. You’ll need to provide them with our outgoing IP addresses, which can be found at this link. We may add new IP ranges in the future. To make sure you receive an update when this happens, subscribe to our whitelisting page.

If you’re using cPanel, here’s what the process looks like:

whitelisting example cpanel

Is there anything else I need to do?

Before whitelisting, we recommend that your SPF record and DKIM records are updated to include an entry for SMTP2GO. To ensure that your records are setup correctly, you can test using the “Sender Domains” section within your SMTP2GO dashboard. If you’re receiving an error message like “553 Envelope sender rejected”, make sure that all of the steps in this article have been followed, and that solve your issue.

If you need any assistance with any of this, or if you have any doubts, please don’t hesitate to get in touch!

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