postfix-users October 2010 archive
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postfix-users: Re: postqueue -p && postsuper ageout, tra

Re: postqueue -p && postsuper ageout, transfer, ...

From: Victor Duchovni <Victor.Duchovni_at_nospam>
Date: Tue Oct 26 2010 - 20:35:30 GMT

On Tue, Oct 26, 2010 at 10:25:32PM +0200, Rok Poto??nik wrote:

> On 26.10.2010 22:08, Jeroen Geilman wrote:
>> Then you're probably accepting way too much mail that you shouldn't, as
>> the other guy said.
>> Even with volumes exceeding 100K per day, I don't have deferred messages.
> ISP mail servers usually accept a large number of messages that most
> company's mail servers reject (e.g. only accept only email sent from the
> hosted domain). Unfortunately we can only limit the email till one point,
> after that we must somehow work around the issues...

Arm's-length backup MX hosts, that don't know the target domain's
recipient list and don't offer the same anti-spam defense do more harm
than good. If you are an ISP that offers backup-MX services, you should
work with your clients to obtain and maintain valid recipient lists, or
work with the client to discontinue the backup MX service.

-- Viktor.