With user@gmail.com or user as username, I get the following log file dump.
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:17.858 ,"Couldn't open TCP connection with specified device in EMAIL @0000023E"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:17.856 ,"SMTP disconnected!"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:17.855 ,"Server connection lost. Shutting down..."
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.871 ,"Starting TLS handshake..."
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.870 ,"220 2.0.0 Ready to start TLS"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.802 ,"STARTTLS.."
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.801 ,"250 SMTPUTF8"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.801 ,"250-CHUNKING"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.800 ,"250-PIPELINING"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.799 ,"250-ENHANCEDSTATUSCODES"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.726 ,"250-STARTTLS"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.725 ,"250-8BITMIME"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.724 ,"250-SIZE 35882577"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.723 ,"250-smtp.gmail.com at your service, [12.345.678.901]"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.722 ,"EHLO [192.168.0.91].."
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.722 ,"220 smtp.gmail.com ESMTP e9sm98844pfb.52 - gsmtp"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.636 ,"SMTP connected!"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.565 ,"Connecting to SMTP server..."
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.564 ,"DNS lookup complete"
192.168.0.91 Port 29298(0x7272),02/21/19 16:41:07.563 ,"Beginning DNS lookup..."