220 mx1.e-tiger.net ESMTP Exim-NetSys Thu, 22 Aug 2019 06:36:42 +0200
451-You have no reverse DNS, internet connections / mail servers must have one!
451-Please contact your internet provider or your system administrator! Our
451 customers should try to use port 1025.
214 AUTH STARTTLS HELO EHLO MAIL RCPT DATA BDAT NOOP QUIT RSET HELP EXPN VRFY
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