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List:       postfix-users
Subject:    Re: Postfix VRFY
From:       Philipp Ewald <philipp.ewald () digionline ! de>
Date:       2019-11-20 14:14:16
Message-ID: 4d94eabf-de8f-bbcb-df5f-37a19d39630a () digionline ! de
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oh damn it...
i don't mean the MTA i think i mean MDA?

i would suggest to check MX-record or/and reply-to or/and SMTP mail from

so postfix can (maybe)probe only postmaster@DOAMIN.tld and cache the result

Am 20.11.19 um 15:01 schrieb Wietse Venema:
> Philipp Ewald:
>> BTW:
>> by reject_unverified_sender:
>> would it not be better to check sending server? like accept connection
>> on port 25 not whole sender? this way dont work with mailing list ( it
>> would but its produce many mail probing)
> 
> That would be immensely stupid idea. First, there is no requirement
> that a sending MTA can receive email. Second, the sending MTA may
> be an email forwarder. The only hosts that can know if the sender
> address is valid are the hosts that receive email for that address.
> 
> 	wietse
> 
-- 
Philipp Ewald
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