Sendmail / Postfix - Testing mailserver
Links qmail.jms1.net BSD Handbook Sendmail.org This expects you to have netcat, perl and openssl installed Hello without TLS nc mail.server.com 25 220 mail.server.com ESMTP Sendmail 8.14.7/8.14.7; Thu, 11 Sep 2014 12:01:22 +0200 (CEST) > ehlo friendly.server.com 250-mail.server.com Hello friendly [1.2.3.4], pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-8BITMIME 250-SIZE 250-DSN 250-ETRN 250-AUTH DIGEST-MD5 CRAM-MD5 250-STARTTLS 250-DELIVERBY 250 HELP > quit< 221 2.0.0 mail.server.com closing connection Hello with TLS openssl s_client -starttls smtp -crlf -connect mail....