sendmail question

[Matt Kettler]

Suggestion:

Use SPF and a SPF milter.

If you private IPs in use, and have split-dns you can have your SPF records be
different when queried from the inside vs outside. That way only inside hosts
(including your mailserver) will see the SPF records containing your private IPs.



Furnish, Trever G wrote:
> I don't have a solution for you, but that would be a very useful
> feature.  I'd love to limit the domains my internal users can send from,
> to combat the problem of ignorant developers who, for example, set the
> envelope sender to an address we don't own in mail sent from web forms.
> 
>> -----Original Message-----
>> From: mailscanner-bounces at lists.mailscanner.info 
>> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf 
>> Of Matt Hampton
>> Sent: Wednesday, November 29, 2006 11:13 AM
>> To: MailScanner discussion
>> Subject: OT: sendmail question
>>
>> Evening
>>
>> Does anyone know how to configure sendmail to restrict which 
>> domains an IP can send from?
>>
>> I.e.
>>
>> 123.123.123.123 is allowed to send email from domain.com, example.com
>> 123.123.123.124 is allowed to send email from domain.co.uk, 
>> example.com
>>
>> (I could do this in a milter but would prefer to do this in 
>> an database file like the access map)
>>
>> regards
>>
>> Matt
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