What is a DKIM signature
DKIM (DomainKeys Identified Mail) signature is an email message authentication method that identifies the actual identity of the domain sending the messages. It helps prevent spoofing on outgoing messages.
What is a DKIM signature for?
The DKIM signature allows you to identify if a message was actually sent from your provider's SMTP servers. Having a DKIM signature active on all your sent emails is a good practice and can be very useful in case of analysis following a cyber incident. The signature allows you to determine if the message was actually sent by you and that it has not been modified after you sent it.
Set up a DKIM signature
All email messages sent by Mail PRO SMTPs are digitally signed, by default, with a shared DKIM signature. This happens in order to increase their reputation and ensure greater security. No setting or modification of the domain DNS is therefore necessary, as DKIM signature is already active.
With Mail PRO, it is possible however to set up a customized DKIM signature for a single domain, if necessary. Custom DKIM signatures can be activated on your request.
Before requesting us to enable a custom DKIM signature for your domain, make sure the SPF record is correctly set up.
If you need a custom DKIM signature open a support ticket and we'll help you.
Keep reading: DMARC policy settings
