From Email Address: abc123@gmail.com
To   Email Address: abc123@gmail.com
SMTP Server:        smtp.gmail.com
Port:               465
Security:           TLS
TLS Mode:           NOT checked
TLS Server Certificate Check: Off
Authentication:     CHECKED (enable SMTP auth)
Username:           abc123@gmail.com
Password:           *******
Authentication Method: Best available

root: msmtp service executed
msmtp: host=smtp.gmail.com tls=on auth=on user=abc123@gmail.com from=abc123@gmail.com recipients=abc123@gmail.com errormsg='cannot read from TLS connection: a protocol violating EOF occured' exitcode=EX_IOERR
root: Failed to send test email to: abc123@gmail.com.

account default
domain
host smtp.gmail.com
port 465
protocol smtp
from abc123@gmail.com
auth on
user abc123@gmail.com
password <plaintext_pw>
tls on
tls_starttls off
tls_certcheck off
syslog LOG_MAIL