On Sat, Aug 29, 2015 at 07:11:54PM +0200, Vincenzo Lucarini wrote:

> Perhaps an example may help:
> 
> i have two alias in my sql table for virtual domain:
> 
> [email protected]   [email protected]
> [email protected]   [email protected]
> 
> when i send a message to [email protected] from [email protected] i obtain two email
> to pluto e pippo.
> 
> If [email protected] send a mail to [email protected] i want only the email to pippo
> without the mail to itself. It is possible to block the first alias based on
> sender/domain sender at postfix level, or it is better to see dovecot
> configurations?

This is difficult to do and not worth it.  You can create an email
address for pippo that delivers only to pippo, and pluto can use
that.

    [email protected]       [email protected]
    [email protected]       [email protected]

Then deliver "pippo-mailbox" to pippo's mailbox.  Pluto can send
mail to "pippo-mailbox" if he's particular averse to receiving a
bcc copy of the mail he sends.

-- 
        Viktor.

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