Sv: Force clients to use pgp encryption when sending email?

[Austin Witmer]

Thank a bunch for the suggestions. I really appreciate the help.

On 12/8/2021 1:17 AM, Sebastian Nielsen wrote:
> Another solution is to use for example Ciphermail to automatically encrypt mail server-side. In this way you don't need to reject non-encrypted mail, you can just make sure it gets encrypted before it leaves premises.
>
> -----Ursprungligt meddelande-----
> Från: dovecot-bounces at dovecot.org <dovecot-bounces at dovecot.org> För Austin Witmer
> Skickat: den 8 december 2021 07:15
> Till: dovecot at ptld.com; dovecot at dovecot.org
> Ämne: Re: Force clients to use pgp encryption when sending email?
>
> Thanks for that info! It’s just what I needed!
>
>> On Dec 7, 2021, at 8:35 PM, dovecot at ptld.com wrote:
>>
>> 
>>> Basically I want the server to check if the message being sent is encrypted with OpenGPG and either proceed or reject the message based on that criteria.
>>
>> Postfix is your submission service so i think best to look that direction. If there is a header you can check for (if the header exist then allow sending) then postfix has header checks regexp/pcre that would be simple enough to setup.
>>
>> On the more complex side, postfix also supports policy servers you can write as a script (php, perl, python, etc) or you can go full on milter.
>>
>>
>> http://www.postfix.org/header_checks.5.html
>> http://www.postfix.org/SMTPD_POLICY_README.html
>> http://www.postfix.org/postconf.5.html#non_smtpd_milters