DNS Configuration of Outbound Email

[Stef Morrell]

It's not required by an RFC, but as has been discussed the DNS 
status of a host is often used as a criterion by stricter 
servers to decide if they should accept the mail.

Good practice therefore should seem to indicate that it's set
up correctly. It should look up forwards and backwards and 
yield the same results. This will frequently mean you need
to set up a CNAME rather than an A record, unless you have
control of the reverse lookup tables.

Stef

> -----Original Message-----
> From: MailScanner mailing list 
> [mailto:MAILSCANNER at JISCMAIL.AC.UK] On Behalf Of Derek Winkler
> Sent: 05 May 2005 15:21
> To: MAILSCANNER at JISCMAIL.AC.UK
> Subject: OT: DNS Configuration of Outbound Email
> 
> I've got a user who's complaining that they can't send email 
> to a particular domain.
> 
> They're rejecting our connections because our host as 
> announced in the ehlo doesn't have an A or MX record.
> 
> Does this seem like a reasonable thing to require?
> 
> Anyone know if it is required by an RFC?
> 
> Seems like overkill to me since an outbound mail host isn't 
> necessarily used for inbound email as well.
> 
> I'll change my ways if it's required by an RFC though.
> 
> Thanks,
> 
> Derek
> 
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