Can anyone help me make sense of this:
I have a clients domain which has a newsletter system on another server their mx and spf records list both the zimbra server I am in charge of and their newsletter server which they bulk mail to their mailing list with. They were having some issues with gmail and their newsletters getting through so they were advised to setup DomainKeys on their newsletter server. As far as I understand it they need to add the public key to their DNS and they have asked me if I need to setup the key on the zimbra server???
Is this necessary? If so how would I impliment this. I have read a few posts here but I haven't seen a definitive guide and to be hnest I really don't understand all this DKIM/DomainKeys thing? Do I really need to do this just because their newsletter server uses it?
Please can someone bring me into the light.
Thanks very much!