Dear Postfix Group,
we have the problem that some Microsoft applications supply an empty
sender. Given that the client is SMTP authenticated we would like to
allow empty senders (mail from: <>).
Here are our restrictions:
smtpd_sender_restrictions =
#check_sender_access mysql:...,
check_client_access hash:...,
check_recipient_access hash:...,
check_sender_access mysql:...,
permit_mynetworks,
reject
smtpd_recipient_restrictions =
#check_sender_access mysql:...,
check_client_access hash:...,
check_recipient_access hash:...,
reject_non_fqdn_recipient,
permit_mynetworks,
check_client_access hash:...,
permit_sasl_authenticated,
reject
As you can see there are some mysql queries. The query that was
commented out returned "PERMIT" for empty senders, but still Postfix
rejected when using those rules.
The funny thing is that from localhost, supplying an empty sender is no
problem at any time, while from external clients it seems to be
impossible...
Best regards,
Eddy
