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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