> Date: Thursday, October 26, 2017 20:00:44 +0200 > From: Matus UHLAR - fantomas <uh...@fantomas.sk> > >>>> Here's what delphi-real-estate.com looks like: >>>> >>>> www 28800 A 72.251.232.102 >>>> @ 28800 MX 10 mail.delphi-real-estate.com. >>>> >>>> Do you mean I need to set an A record for delphi-real-estate.com >>>> ? > >> On 10/26/2017 09:18 AM, Richard wrote: >>> No, you don't need an A-record for delphi-real-estate.com (for >>> mail purposes at least) since you have the MX pointing to >>> mail.delphi-real-estate.com. >>> >>> But you need an A-record for mail.delphi-real-estate.com >>> (analogous to the A-record you have for www.) otherwise no >>> sending MTA will be able to reach it. > > On 26.10.17 09:36, cac...@quantum-equities.com wrote: >> Yes I have my smtp server set to mail.delphi-real-estate.com. >> >> Maybe I have it now. I've set my zone file so: >> >> delphi-real-estate.com. 28800 A 72.251.232.102 >> www 28800 CNAME delphi-real-estate.com. >> mail 28800 A 72.251.232.102 >> @ 28800 MX 10 mail.delphi-real-estate.com. >> >> Is this correct? > > No. > > He explicitly said "you don't need an A-record for > delphi-real-estate.com" and "need an A-record for > mail.delphi-real-estate.com" - you did not do what was > needed, you did what was NOT needed. > > there is no "mail.delphi-real-estate.com" so there is nowhere to > deliver mail for your domain. I wonder other servers accept mail > for you - many servers don't accept mail from undeliverable > source addresses
He changed www. from an A-record to a CNAME (pointing to delphi-real-estate.com), so (now) the A-record for delphi-real-estate.com is indeed needed/correct. As you noted in a followup, he did also get the A-record in for mail. So, the dns records seem to be getting there (except for the lack of a PTR record for 72.251.232.102), however there appear to be a range of postfix configuration issues pending.
