[Gllug] Configuring SPF to cope with secondary incoming mail servers

[john at sinodun.org.uk]

> On Tue, 5 Dec 2006 john at sinodun.org.uk wrote:
>
>> Do you publish a record for inclusion by those who host with you and
use your smarthosts for outgoing e-mail?  My current ISP did for a
while and then deleted it without warning which caused much trouble.
>
> No, it would be stupid to so do as I have no idea whatsoever where they
send email from.

Not so stupid - it lets people who use *your smarthosts* for sending
e-mail include those smarthosts in their SPF records without having to
update their records each time you change the smarthosts.  Obviously if
they also send e-mail from elsewhere then they will need other entries in
their SPF records as well.

If you don't publish such a record, then anyone routing outward e-mail
through your smarthosts needs to be notified each time you do a
configuration change so that they can update their SPF record.

John




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