MX records and IP addresses for EU customers
This article lists the
MX records and IP addresses used by the USS Email Security service.
MX RECORDS (Inbound)
You should use the following MX records.
Smart Hosts (Outbound)
You should use the following smart hosts for outbound e-mail. Port
587 can be used for sending outbound email.
The following IP addresses and ranges are used by E-mail Security to deliver email to your server. Mail delivery operates on the standard SMTP port of
25. Please make sure your firewall and/or email server is configured to accept connections from these IP addresses:
If you use an SPF record for your domain, it should be updated to include the following:
-all in your SPF record could mean that the remote domain will reject your email if the TTL has not expired.