SMTP -> FROM SERVER:220 zimbra020-mum.megavelocity.net ESMTP Postfix
SMTP -> FROM SERVER: 250-zimbra020-mum.megavelocity.net
250-PIPELINING
250-SIZE 26214400
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 CHUNKING
SMTP -> FROM SERVER:220 2.0.0 Ready to start TLS
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