Am 16.02.2012 14:06, schrieb daniel zhou:
> Hi Group,
> 
> The document segment about the reject_unknown_sender_domain says that it will 
> reject the domain without A record or
> MX record. Does it mean that only domains with both A and MX record will be 
> accepted? Or, it means any domains with
> only A record,domains with only MX record or with both will be accepted. Can 
> anyone clarify it? Thanks!

both missing

> I just want to block the senders whose domain without MX record, even if it 
> has an A record.

you must not do this because you will block normal
mail without any reason!

i was there by verify importing newsletter-lists with a php-application
and had to change this because well known contacts of our customers
were thrown out while they had active mail in both directions on
the "normal" server



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