Hello

If I added this config in main.cf:

smtpd_helo_restrictions =   permit_mynetworks,
                            reject_invalid_helo_hostname,
                            reject_non_fqdn_helo_hostname,
                            reject_unknown_helo_hostname

many email MUA such as thunderbird were delivering messages from a dyna IP with just localhost as HELO hostname. so their messages will be rejected by postfix.

If I changed the above configuration to:

smtpd_helo_restrictions =   permit_mynetworks,
                            permit_sasl_authenticated,
                            reject_invalid_helo_hostname,
                            reject_non_fqdn_helo_hostname,
                            reject_unknown_helo_hostname


it seems in HELO stage permit_sasl_authenticated not happened. so email was still rejected.

for home users and desktop clients, should I disable the helo checking above?

Thank you.
tom
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