I spend NO TIME doing this. Recently we did have to reg the domain with Yahoo and a few others it took seconds to cut and paste the domain and hit submit. You are using an objection that is not real. Sorry.
Discussion
TBH when I looked after a server it was a strange setup with outbound going through the upstream providers server & that side of things was not part of the job...
It was a long time ago.
Maybe I'll take another look.