Re: Postfix (Fetchmail and Dovecote) on OSX 10.6.7 ???

[Daniel J. Luke]

On Jun 18, 2011, at 4:39 AM, Bjarne D Mathiesen wrote:
> 
>> be careful with openDNS and other providers as you want to make sure you have them set to not do their 'magic' stuff (I believe openDNS has a setting you can configure so they don't do their automatic redirection stuff if you want to use it with a mailserver).
> 
> openDNS gives you the IP-address for their seach page when you request
> A-record but a 'not found' answer when you request MX-records
> dig @208.67.222.222 A  qwerasdfzxcv.info
> dig @208.67.222.222 MX qwerasdfzxcv.info

you can send mail to domains without MX records.

(
RFC 2821 - 
   "IF no MX records are found, but an A RR is found, the A RR is treated as
   if it was associated with an implicit MX RR, with a preference of 0,
   pointing to that host."
)

--
Daniel J. Luke                                                                   
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