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Hello Ake,

Am 09.11.2021 um 09:32 schrieb Åke Olsson <konsult@xxxxxxxxxxxxxxx>:

I have a client that has been using Domino for some years as their mail server (incoming and outgoing) for some years.

They have now discovered that their old Domino version is too old for some SSL features and that they need to upgrade.

For some reason I feel that this may not be the right path. They only use Domino as an email server and domino is filled with an enormous amount of other stuff that they definitely do not need.

While you are correct with your "oversized" claim, apparently the customer is happy to use only a fraction of the possibilities?

What other mail servers can be installed on the IBM i? Any open source versions out there?

IBM i includes an SMTP and Pop3-Server. Unfortunately, no IMAP Server, which would make that a complete mail server solution. I don't know if some Open Source IMAP server has been ported (to PASE).

Another way to deal with the outdated crypto would be to establish a (linux based) mail gateway in front of the i. Incoming mail goes to the Linux machine with all the modern crypto stuff, and is passed to the i with older or even no crypto at all (which isn't a big problem if it's in the same LAN). Outgoing mail works the same, but just backwards.

On important thing to consider is that there needs to be some means to prevent backscatter: The mail gateway in front *must* know about valid mail addresses so it can outright reject johndoe@xxxxxxxxxxxxxxx while the SMTP connection from an internet sender is still open.

Contact me privately if this might be a good way to go, because it's no longer related to IBM i.

:wq! PoC


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