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msmtp and Google's SMTP Relay Service

• Tagged Server-side, Guide, and Debugging

If you’re using msmtp to send email through Google’s SMTP Relay Service, you might get this error: “the server sent an empty reply”.

To fix, try setting a domain in your /etc/msmtprc file. For example, if you’ve configured SMTP Relay to allow email from your server’s IP with TLS and no authentication, and your Google Workspace domain is, your /etc/msmtp file might look like:

auth        off
tls         on
logfile     /var/log/msmtp
from        [email protected]

account     default
port        587

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