I have a domain isbd.net which is hosted for me at BSNet where I have access to the zone file. I have added a CNAME record home[.isbd.net] which points at my home system (which has a static IP with a very long name).
This works perfectly for me so far, I can access Web pages on the home machine's apache server at home.isbd.net and any port I open up is accessible as home.isbd.net.
I have Postfix on my home system (for sending mail). If I want it to receive mail as well what do I need to do to the zone file[s]?
At BSNet (where isbd.net has its zone file) will the CNAME entry I already have mean that mail for xxx@home.isbd.net will get sent on or do the MX records for isbd.net catch home.isbd.net mail as well?
If home.isbd.net mail *is* sent on to my home machine do I need to do anything to the zone file there for it to accept the mail or will having Postfix listening on port 25 be all that's needed?
(I suspect that *strictly* I should have a zone file with MX records on my home machine but that it may well work without)