Deployed simple Postfix setup. Currently using Google's SMTP server as smarthost:
relayhost = [smtp.gmail.com]:587
smtp_sasl_auth_enable=yes
smtp_sasl_security_options=noanonymous
smtp_use_tls=yes
smtp_tls_note_starttls_offer=yes
smtp_tls_security_level=encrypt
smtp_sasl_password_maps=hash:/etc/postfix/saslpassword
Have corresponding file /etc/postfix/saslpassword
[smtp.gmail.com]:587 <mail>:<password>
However, having sensitive credentials in plain text bothers me.
Is there any way to use smarthost without authentificating?
I mean, not for spamming via open relay but for convenience of not specifying password in plain text and a bit more additional privacy?
Any help is much appreciated, thanks.