Does / Can Block authentication by country automatically blacklist an IP address ?

Problem reported by Curtis Kropar www.HawaiianHope.org - 3/10/2026 at 7:08 PM

Submitted

We just turned on Block Authentication By Country, none of our users are outside of the USA.

Does the feature also blacklist any IP Address that attempts to log in as one of our users ?

If not, I would like to make that a suggestion as I often see some IP addresses trying to authenticate as our users and also sending spam to the same users. It would be great to auto blacklist if they are attempting to hack in.

www.HawaiianHope.org - Providing technology services to non profit organizations, low income families, homeless shelters, clean and sober houses and prisoner reentry programs. Since 2015, We have refurbished over 11,000 Computers !

2 Replies

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terry fairbrother Replied

3/11/2026 at 1:28 AM

I had to turn my block list off as it was blocking too many users that connect over mobile data. Now bare in mind i'm in the UK, the connections at the moment look like this (no one is outside the UK)

So yes, if a user tries to authenticate on a blocked IP, their email client will ask for a password

Gabriele Maoret - SERSIS Replied

3/11/2026 at 10:06 AM

Are they using MS Outlook Mobile?

If yes, unfortunately Outlook Mobile does not connect directly to the server from your location.

Instead, it connects to a Microsoft Azure datacenter acting as a “proxy,” and then it connects to your SmarterMail server from there.
This means it can connect from any country that has an Azure datacenter...

Gabriele Maoret - Head of SysAdmins and CISO at SERSIS Currently manages 6 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 5 on-premise for customers who prefer to have their mail server in-house)

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