RE: [courier-users] how to configure SPF records?

Ricardo Kleemann wrote:
> I've never configured SPF, I don't even know if my version of courier
> supports SPF (I'm using 0.44.2)

No, it doesn't. The first version of Courier that supported SPF
_checking_ was 0.47.0.

However, that doesn't matter in this case, because it was another server,
not yours, that performed an SPF check. Be aware that the concept of SPF
is comprised of two parts: (1) publishing SPF DNS records for sender
domains, and (2) receiver-side checking of messages against published SPF
records.

(Publishing SPF records happens in the domain name system, and has nothing
to do with the website at http://spf.pobox.com.)

> A client is having some trouble when using authenticated smtp. The
> server on the other end is complaining about SPF records, I get this
> bounce:
>
> ----- The following addresses had permanent fatal errors -----
> <chico02@joimail.com>
> (reason: 550 SPF NONE, if sender valid send to
> allow-uqwz-64.80.255.252@joimail.com more info see
> http://mail.joimail.com/allow.htm)

This error message is too little information for anyone to completely
analyze the problem you are experiencing.

The one thing I can read from your report is that the MX of joimail.com
checked the message relayed through your server for SPF compliance, and
then rejected the message, probably because the message's MAIL FROM
(envelope sender) domain did not have an SPF record.

It is highly unusual for receivers to _require_ sender domains to have an
SPF record. In the long run, if/when SPF has become ubiquitous, this will
be a useful practice, but at this time, you just can't expect all domains
to have SPF records. So you should tell postmaster@joimail.com not to
reject messages on an SPF result of "NONE".

But it would of course be wise for the sender's domain to publish an SPF
record anyway. Unfortunately, one can't tell which domain that is without
seeing the original message -- was it attached to the bounce?



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