2023

   1 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
   2 250-myhost.test.ex Hello CALLER at a.b.c [10.9.8.10]
   3 250-SIZE 52428800
   4 250-8BITMIME
   5 250-PIPELINING
   6 250-STARTTLS
   7 250 HELP
   8 550 Administrative prohibition
   9 221 myhost.test.ex closing connection