Subj : email relay error
To   : Dumas Walker
From : Digital Man
Date : Wed Jan 31 2024 14:42:11

  Re: email relay error
  By: Dumas Walker to DIGITAL MAN on Wed Jan 31 2024 11:30 am

 > For the past couple of days, I have been getting the following errors when
 > trying to relay mail via mail.synchro.net.
 >
 > 0036 SEND/TLS [mail.synchro.net] WARNING 'Bad/unrecognized data format'
 > (-32) setting session active
 > 1/31 11:02:38 mail 0036 SEND connecting to port 587 on mail.synchro.net
 > [71.95.196.36]
 > 1/31 11:02:38 mail 0036 SEND !INVALID RESPONSE: '421 System Error: Maximum
 > connections exceeded, try again later' Expected: '220'
 > 1/31 11:02:38 mail 0036 SEND mail.synchro.net replied with: "421 System
 > Error: Maximum connections exceeded, try again later" instead of the
 > expected reply: "220 ..."
 >
 > The system tries again later and gets the same response.  Could there be a
 > boo-boo on my end that is causing that response, or is it something going on
 > at the server end?

I was probably just under a botnet attack at that time. I have my SMTP[S] server set to 100 clients, which is normally plenty, but the botnets can time connect thousands of a clients at a time (or try to), thus starving out legit clients. Just try again, it looks fine right now.
-- 
                                            digital man (rob)

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