Never good enough (on the spam filters) but great suggestion.
The user has disabled forwarding and is using POP3 to pull mail into
Gmail.
Thanks all for the help!
-Warren
On 11/09/2017 4:35 pm, Dave Warren wrote:
> On 2017-11-08 12:20, Warren Volz wrote:
>
>> All,
>>
>> One of my users has their account setup to forward mail to Gmail. Recently
>> I've started to see lots of rejects that look like the following:
>>
>> <us...@gmail.com> (expanded from <us...@somelocaldomain.net>): host
>> gmail-smtp-in.l.google.com[2607:f8b0:400e:c04::1a] said: 550-5.7.1
>> [ipv6 address 18] Our system has detected that
>> 550-5.7.1 this message is likely suspicious due to the very low reputation
>> of 550-5.7.1 the sending IP address. To best protect our users from spam,
>> the 550-5.7.1 message has been blocked. Please visit 550 5.7.1
>> https://support.google.com/mail/answer/188131 for more information.
>> p26si2014836pli.781 - gsmtp (in reply to end of DATA command)
>>
>> I've looked over the forwarding best practices provided by google and we are
>> not modifying the envelope sender. I'd rather not start throwing away what
>> our filter marks as spam since I leave that up to the user, but is that the
>> only way to stop the bounces? Also, is the "18]" an artifact or some kind of
>> error?
>
> How good are your spam filters? One thing you can try is to only forward
> non-spam and dump the spam in the user's mailbox.
>
> Next, have the user configure Gmail's POP3 account retrieval feature so that
> Google will retrieve the spam and add it to the mailbox. There will be some
> degree of latency for the spam to come through, but nothing gets lost.
>
> It mostly doesn't matter if you deliver the non-spam into your local mailbox
> (and forward it) or just forward it as Gmail skips duplicate messages.
>
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