Hi everyone!
I'm sharing this to see if we are alone on this.
We had a massive amount of connections to our servers coming from a single
hostname at Mimecast (us-smtp-delivery-179.mimecast.com - It has multiple IPs:
https://check.mx/a/us-smtp-delivery-178.mimecast.com)
The amount was at least 5 times the number of connections we have from GMail at
its highest (our baseline).
What's odd here is that it's really specific to this hostname
(us-smtp-delivery-179).
Our only solution was to block the IPs at the firewall level, which solved the
issue, but I was wondering if we were the only ones.
Thanks !
Cyril - [ImprovMX](https://improvmx.com)
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