Setting up SPF records
For email sent from the relay
If you send email via our smtp relay cluster at
then the mail can originate from any of the hosts in the cluster. If you want to set up the Sender Policy Framework (SPF) records in DNS for your domain, then we have a list of the servers in that cluster at
All you need do is add
to the SPF record in your domain and those mail servers checking SPF should be happy with anything sent via the relay.
For email sent directly
If you send email directly to the internet then you are as well adding a 'smtp-senders' A record to your DNS for the domain in question and listing the IP addresses of all the Brightboxes that will send email.
Then your SPF record will contain:
and that should satisfy those mail servers checking SPF.