glitch-city-laboratories/configuration/msmtprc

defaults
auth           on
tls            on
tls_trust_file /etc/ssl/certs/ca-certificates.crt
logfile        /var/log/msmtp.log

account        email
host           @GCL_SMTP_HOST@
port           @GCL_SMTP_PORT@
from           @GCL_SMTP_FROM@
user           @GCL_SMTP_USER@
password       @GCL_SMTP_PASSWORD@
...

# Set a default account
account default : email