cl@isbd.net wrote: [...]
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]?
Short answer: it depends how your zone and Postfix are configured.
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?
More likely the first than the second, but I seem to recall that some buggy mailservers handled CNAME badly.
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?
Andrew Savory recently did something similar. See http://www.andrewsavory.com/blog/archives/001257.html (but Googlemail really does not rock).
Hope that helps,