SERVER -> CLIENT: 220 sxb1plsmtpa01-01.prod.sxb1.secureserver.net :SMTPAUTH: GtRBvXbjlGDwJ : ESMTP server sxb1plsmtpa01-01.prod.sxb1.secureserver.net ready
CLIENT -> SERVER: EHLO Ahmed
SERVER -> CLIENT: 250-sxb1plsmtpa01-01.prod.sxb1.secureserver.net hello [154.179.6.18], secureserver.net
250-HELP
250-AUTH LOGIN PLAIN
250-SIZE 30000000
250-PIPELINING
250-8BITMIME
250-STARTTLS
250 OK
CLIENT -> SERVER: STARTTLS
SERVER -> CLIENT: 220 Ready to start TLS
CLIENT -> SERVER: EHLO Ahmed
SERVER -> CLIENT: 250-sxb1plsmtpa01-01.prod.sxb1.secureserver.net hello [154.179.6.18], secureserver.net
250-HELP
250-AUTH LOGIN PLAIN
250-SIZE 30000000
250-PIPELINING
250-8BITMIME
250 OK
CLIENT -> SERVER: AUTH LOGIN
SERVER -> CLIENT: 334 VXNlcm5hbWU6
CLIENT -> SERVER: [credentials hidden]
SERVER -> CLIENT: 334 UGFzc3dvcmQ6
CLIENT -> SERVER: [credentials hidden]
SERVER -> CLIENT: 535 ...authentication rejected
SMTP ERROR: Password command failed: 535 ...authentication rejected
SMTP Error: Could not authenticate.
CLIENT -> SERVER: QUIT
SERVER -> CLIENT: 221 sxb1plsmtpa01-01.prod.sxb1.secureserver.net :SMTPAUTH: closing connection
SMTP Error: Could not authenticate.
ERROR: SMTP Error: Could not authenticate.