Mailing List Message #104888
From: Bill Cole <>
Subject: Re: Reverse DNS mismatch
Date: Sat, 05 Apr 2014 13:51:57 -0400
To: CommuniGate Pro Discussions <>
X-Mailer: MailMate (1.7.2r4025)
On 5 Apr 2014, at 6:54, Juergen P. [core] wrote:


One or more SOA fields are outside recommended ranges. Values that are out of specifications could cause delays in record updates or unnecessary network traffic. The SOA fields out of range are:

mname | | expire | 604800 | EXPIRE - RFC1912 suggests a value between 1209600 to 2419200.

It is ridiculous to treat operational advice in RFC1912 from 1996 (a year before the invention of dynamic DNS updates) which was only ever relevant to how authoritative servers interact to modern DNS configuration. The "EXPIRE" value has no function outside of the secondary authoritative servers for a zone, so it is crazy to try to validate its published value.

No MX records exist within the zone. This is legal, but if you want to receive E-mail on this domain, you should have MX record(s).

If a domain would have a single MX resolving to a name with a single A for the bare domain name or which resolves to the same IP as the single A for the bare domain, the MX is functionally useless. Treating the lack of an MX for a domain which has a single A record as problematic for mail in any way is technically invalid and extremely rare.
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster