Heho,

yeah, the two versatel addr. also have vrfcanaclu01.rfcanalyzer.net-
vrfcanaclu03.rfcanalyzer.net as fDNS. $database yielded a mix of Dutch
gov/academia IPs and random ISP stuff under rfcanalyzer.net.

For me connections are either the same, or an IO-Error/Worst case the
packet storm.

However, i just get the v6 inbound.

Let's see what their SOC says to this. 

With best regards,
Tobias

On Sat, 2023-03-11 at 20:34 -0600, Michael Rathbun via mailop wrote:
> On Sun, 12 Mar 2023 02:54:56 +0100, Tobias Fiebig via mailop
> <[email protected]> wrote:
> 
> > So, has anyone else seen this in mail.logs/has an idea what that
> > host
> > is doing?
> 
> The connections here attempt STARTTLS, which fails with SSL error
> 0x80090331.
> 
> These come from 87.215.108.211 and .212, in .nl.  
> 
> This behaviour has been exhibited by a number of other hosts, mostly
> originating from OVH netblocks geolocated in .fr.
> 
> mdr

-- 
Dr.-Ing. Tobias Fiebig
T +31 616 80 98 99
M [email protected]

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