On Mon, 8 Jun 2020 21:53:06 +0000 (UTC), Jon Morby via mailop
<mailop@mailop.org> wrote:

>We just get a 554 after connect and before any handshake. I’ve tried this from 
>various IPs, not just our mail server IPs in AS8282

It's not just you.  After a telnet to an MX there, I see

>554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for help or to 
>contact t...@rx.t-online.de to clarify.) (BL)
>Connection closed by foreign host.

mdr
-- 
         "There are no laws here, only agreements."  
                -- Masahiko


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