Is it 'email list' or 'emailing list'?

We're changing a part of our newsletter's Services text to reflect the fact the newsletter is no longer distributed by snail mail, but by email.

The current text says in part, "We will be pleased to add you to our mailing list for it." Instinctively, I want to change it to, "We will be pleased to add you to our email list for it.", but it seems logical that it should be "add you to our emailing list."

'Emailing list' sounds awkward, but then so does, "We will be pleased to add you to our mail list for it."

If the change from 'mailing' to 'email' is correct, what is the grammatical reason for dropping the 'ing'? Both 'mail' and 'email' have noun and verb forms, both can be made into present participles and gerunds, so that doesn't seem to be it.

Suggestions?

Thanks.

/Peter Morgan