[anti-abuse-wg] Mimecast.com

On Wed, 4 Nov 2015 13:48:51 +0530
Suresh Ramasubramanian <ops.lists at gmail.com> wrote:
> Mimecast’s chief scientist is Nathaniel Borenstein - who originally
> wrote the MIME spec.
> They are legit.  I am not sure what is going on here.
> 
thank you for the reference Mr Ramasubramanian, would you do me the
kind favor of asking them:
why they are blocking @188.40.114.80 - which is also the ip used to
send emails to this list. - and then maybe tell us, in public what is
going on?

If they are not extorting money, then I surely must have abused them or
their users? Or their system is broken, or what?

but i think that they may not bee that legit? or they have changed their
corporate goals? or there are new management, or something?

Just from what you can see here:
https://community.mimecast.com/docs/DOC-1369#554

then they are bouncing with 554 to support@

that is clearly not legit.

or it is a serious flaw/broken system?

they could bounce of course any way they like, but bouncing
with something that is going to return is basically saying only one
thing - there is no way to communicate with them, as when I
do that is simply added to their block... 

that is not cool, nice, decent or even fair bahavior?

andre

> > On 04-Nov-2015, at 1:14 PM, andre at ox.co.za wrote:
> > 
> > Hello,
> > 
> > Has anyone of you had much/any dealings with this crowd:
> > Mimecast.com ?
> > 
> > Less than 1% of our email volume exchanges with them, and yesterday
> > after complaining about abuse/UBE from them and receiving no
> > response, escalated to @telstra and then all of a sudden they are
> > returning all email in a loop:
> > 
> >  support at mimecast.com
> >    host service-alpha-inbound-b.mimecast.com [91.220.42.231]
> >    SMTP error from remote mail server after end of data:
> >    554 Email rejected due to security policies -
> >    https://community.mimecast.com/docs/DOC-1369#554
> > 
> > Then, when I email them from a different server, it goes through the
> > first time and viola, the second email, same block, on the "new"
> > server"
> > 
> > From their website: They provide email filtering services, this
> > feels like they are extorting money from me, which I will not pay
> > of course.
> > 
> > But, have any of you had any similar experiences? As they are
> > providing this type of "service" to some of our @gov departments
> > as well as other large companies, I will have user blowback - what
> > do I tell my users? We are blocked because we dared complaining? 
> > or we are blocked because we do not pay?
> > 
> > any advice will be appreciated, obviously this type of behavior
> > breaks email and the larger the "protectors" become, the more
> > control they have...
> > 
> > tia
> > 
> > andre 
> > 
> > 
>