Looking for a guide to collect all e-mail from the ISP mail server

[Mihai Badici]

On 10/26/20 7:53 PM, Jochen Bern wrote:
> On 26.10.20 17:45, Mihai Badici wrote:
>> So I guess it is not trivial to sort again all the mails and
>> deliver each one in a mailbox after you mixed all together in a single
>> catchall mailbox. Could be done for sure but it is some work to do...
> Determining the intended recipient of a specific *copy* of an e-mail
> (info contained in the envelope) from that copy *after* "final" delivery
> (at the ISP, no more envelope, info *possibly* contained in pseudo
> headers of varying name and reliability) is *most definitely*
> nontrivial, and (used to be?) known as a prime cause of mail loops.
>
> If you don't know *exactly* what you're doing, maintain your myriad of
> users/mailboxes *both* at the ISP and on your internal servers and put
> the "mails in ISP mailbox X *all* go into internal mailbox Y, and
> nowhere else!" relations "hardcoded" into your retrieval tool's config.
>
> Regards,

That's exactly why I recommended  to use smtp relay. Maintaining two 
user's database without any  password sync mechanism available it's 
asking for trouble. Well, with under 10 user you can manage...

As a bonus, you have a near "real mail system" and you eventually learn 
to manage it :)