We are going to use a 3rd party for marketing emails, they have requested we put a couple of txt files associated with our DNS domain name for SPF.
We use a another 3rd party for email filtering and all mail is channelled through them and our MX records point to them, we dont use SPF with them currently.
This marketing company will be sending mails on our behalf to clients and i just want to make sure by implementing these SPF records to our domain it wont disrupt our normal mail flow.
They have requested one text file be put up as a domain key.
The other is the normal spf txt file containing their domain as below
v=spf1 mx include:domain.com ~all
1) Our 3rd party filtering company say we should also include their mail servers in the txt file, does anyone know the format for this and can it all be in the same txt file.
2) What is a domain key txt file, it looks like something the marketing company have generated, but do i then have to get one from our 3rd party filtering company too?
3) Do you see any potential problems with us publishing these records, we dont do SPF checks on our gateway.