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drew
Automatic
Premium
join:2002-07-10
Port Orchard, WA
kudos:6
reply to PToN

Re: Email with dynamic IP blocks

Are your users not authenticating to the SMTP server?



PToN
Premium
join:2001-10-04
Houston, TX

Yes, they are authenticating.



drew
Automatic
Premium
join:2002-07-10
Port Orchard, WA
kudos:6

I'm having a hard time understanding why an authenticated user on your network is not set up to be bypassing the outbound spam filter.

If you're worried about DLP, etc. that's a whole other set of things. Scanning outbound attachments, etc. for a virus is also a good thing (keeps your IPs from getting blacklisted), but... spam? Why?
--
flickr | 'Cause I've been waiting, all my life just waiting
For you to shine, shine your light on me



PToN
Premium
join:2001-10-04
Houston, TX

Internal networks bypass most of the tests, however, when user use their phones with either 3G/LTE/WiFi/etc, the connection is seen as an external network (certainly since it is not a 192.168.) and because of that it triggers all tests.



drew
Automatic
Premium
join:2002-07-10
Port Orchard, WA
kudos:6

But you said they authenticate...

I'm not an e-mail expert, but I can see no reason why an authenticated user to the mail server is getting run through all those spam tests on the outbound direction. I would strongly consider changing your configuration if at all possible.

Do your users get spam-tested between internal mailboxes too?
--
flickr | 'Cause I've been waiting, all my life just waiting
For you to shine, shine your light on me



Brano
I hate Vogons
Premium,MVM
join:2002-06-25
Burlington, ON
kudos:9
Reviews:
·TekSavvy DSL
·Bell Fibe
reply to PToN

You should be able to bypass certain tests (or all) for authenticated users.

For example when my users are authenticated on postfix I don't send them to regular spam filtering queue, but to alternative filtering queue that is less strict on many items.