[Dovecot] To query two SQL tables for user verification over LMTP, should I use (a) two separate lookups? or (b) just one lookup with a boolean query?

[Patrick Domack]

I'm totally confused by your authenticated as valid part, lmtp doesn't  
authenticate anything.

How do you let postfix know about valid recipients, I don't really  
care about authenticated ones, just valid ones, and if you do that at  
lmtp time, postfix has already received the email, and therefor it  
would bounce if lmtp says it's not a valid recipient.


Quoting jake0534 at airpost.net:

> On Tuesday, October 11, 2011 8:37 AM, "Patrick Domack"
> <patrickdk at patrickdk.com> wrote:
>> postfix delivers to the user, and I don't do lmtp authentication, I
>> just submit the email from postfix to lmtp.
>
> Ok, then we have different approaches.
>
> So you are using *only* Postfix to check if a received user is valid,
> right?
>
>> I'm not even sure how you can use lmtp authentication to verify a
>> delivery address, normally when postfix uses lmtp the email was
>> accepted, and therefor would generate a bounce.
>>
>> I can't find anything that wouldn't bounce using lmtp, in postfix or
>> dovecot documentation.
>
> If you follow this,
>
>  http://wiki2.dovecot.org/HowTo/PostfixDovecotLMTP
>
> it works OK.  There is no bounce when Postfix submit mail to LMTP for
> delivery and the user is authenticated as valid.
>
> Jake