Unsollicited Bulk Email

[Erik Kramer]

Thanks Bryan.

Turned out some users were sending with the my.com email app.

For some reason their servers now consider this client's domain a source
for unsollicited bulk email.

So I told those users to start using another app.

Thanks,

Regards,


Erik

On 19 August 2017 at 18:12, Brian Shaw <bshaw at vsvinc.com> wrote:

> Erik,
>   I would start with determining if it is just one destination that is
> blocking your users or many.  If it is one you should be able to contact
> them and find out why they are blocking you and how fix it.  Or, if it is
> many, contact the RBL sites to see which one has black listed your domain.
>   In the past when I have had this issue the RBL maintainers have been
> pretty easy to work with.
>   Good luck.
>
> Brian
> ------------------------------
> *From:* Erik Kramer <erikkramer at gmail.com>
> *Sent:* Aug 19, 2017 11:04 AM
> *To:* users at lists.kolab.org
> *Subject:* Unsollicited Bulk Email
>
> Hi,
>
> I run a multi domain mail server (Kolab 3.4).
>
> And since yesterday my users receive a message like below, when sending a
> message.
>
> Any ideas on how to fix it?
>
> Thanks for your help,
>
>
> Erik
>
>
> A message from <XXXX>
> to: XXXX
>
> was considered unsolicited bulk e-mail (UBE).
>
> Our internal reference code for your message is 02611-06/Wb81Bb8nbs25
>
> The message carried your return address, so it was either a genuine mail
> from you, or a sender address was faked and your e-mail address abused
> by third party, in which case we apologize for undesired notification.
>
> We do try to minimize backscatter for more prominent cases of UBE and
> for infected mail, but for less obvious cases some balance between
> losing genuine mail and sending undesired backscatter is sought,
> and there can be some collateral damage on either side.
>
> First upstream SMTP client IP address: [XXX.XXX.XXX]
>
> Return-Path: XXXX
> From: XXXX
> Sender: XXXXX
> Message-ID: XXXXXX
>
> Delivery of the email was stopped!
>
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