Am 20.06.2015 um 17:49 schrieb Jered Floyd:

Harald,

no you don't understand how a Barracuda appliance works
emailreg.org is a whitelist like the ones spamassassin is using

in case of a barracuda appliance it overrides the RBL

It's a whitelist that appears to be based solely on paying Barracuda a fee.  
That doesn't sound like a valid whitelist protocol!

most whitelists are based on fee

Has anyone else here run into this?  Is there a way out other than
bribing Barracuda to not block my mail?

tell your customers don't send spam

I'm pretty sure none of my users are sending spam.  I'm not on any other RBLs, 
and I haven't seen recent unusual mail volume.

you need to hit only *once* a honeypot

Regardless, with other RBLs there is typically some information on the triggering 
criteria.  That does not appear to be the case here.  BRBL seems to be a pay-to-play 
whitelist with arbitrary and opaque "poor reputation" categorization.

no it is not, we used a barracuda appliance for nearly a decade and there where zero complaints because the RBL, the unwhitelistable URIBL auf barracuda is much more problematic

listing happens the same way as for other RBLS:

* hit a honeypot
* user complaints

there is a outlook plugin where you can flag every mail as ham or spam and if a few RCPTs flag mails of your customers as spam, well you got listed

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