[BlueOnyx:26348] Re: 5210R sendmail to postfix switch questions

[oldcabin webmaster]

OK I flipped on Postfix and things looked good.

My email client didn't yell at me or anything like that.

The real test will be when clients start interacting with it.

One thing I did notice is my procmail.rc doesn't appear to be being used
once I switched it over

I have a lot of hand written recipes and other things going on that I would
like to be able to still do with Postfix

Can I still use my procmail.rc recipes?

If so, what do I need to do to get it interacting with Postfix like it did
with sendmail.

I have flipped it back to Sendmail for now till I figure this out.

I really really really want to use procmail.  ;-)

I did try to strip out most off of my recipes just to see if I could see
any action in my procmail_log file but once I flipped it to postfix there
was no logging in my logfile

VERBOSE=on
LOGABSTRACT=on
COMSAT=no
LOGFILE=/var/log/procmail_log

Thanks

--Tim




On Mon, Jul 3, 2023 at 4:43 PM oldcabin webmaster <webmasterw117 at gmail.com>
wrote:

> Thank you
>
> On Mon, Jul 3, 2023, 3:41 PM Michael Stauber via Blueonyx <
> blueonyx at mail.blueonyx.it> wrote:
>
>> Hi Tim,
>>
>> > 5210R
>> >
>> > I am pondering switching from sendmail to postfix.
>> >
>> > Anything that I should be aware of with regard to what is going to
>> > change regarding my client's email client setups?
>> >
>> > Is there anything that they will have to change in their settings?
>> >
>> > Can I switch back if I suddenly run into issues (my clients)
>>
>> On 5210R/5211R you can switch between Sendmail and Postfix at any time
>> and in either direction. Typically the clients won't even notice and no
>> config changes are required server side or client side.
>>
>> The main difference between Sendmail and Postfix (as far as BlueOnyx
>> goes) is this:
>>
>> Postfix supports SNI. So it will make use of *all* SSL certificates.
>> That includes the GUI's cert and the SSL cert of all Vsites that have
>> SSL enabled.
>>
>> Whereas Sendmail could only use a single SSL certificate and therefore
>> only used the GUI's SSL cert.
>>
>> With Postfix your clients (who have SSL enabled on their Vsite) no
>> longer get an SSL certificate mismatch if they use SMTPS, POPS or IMAPS
>> and their configured mail-endpoint on the BlueOnyx is the domain name of
>> their Vsite.
>>
>> Of course: If you ever have clients who use *that* setup and switch back
>> from Postfix to Sendmail? Yeah, then they get the "certificate mismatch"
>> again, because Sendmail only uses the GUI cert, which doesn't have
>> provisions for any Vsite SSL.
>>
>> Other than that? Postfix is more robust and takes abuse a lot better
>> than Sendmail. The way we have Postfix set up on BlueOnyx is that each
>> time when Postfix is started it parses the Sendmail configuration and
>> creates a new Postfix configuration on the fly. That way the
>> configuration of both MTAs remains identical and "doesn't drift apart".
>>
>> Should you ever wish to configure Postfix differently than the GUI
>> allows, or want to set a parameter that the GUI doesn't have for the
>> Postfix configuration? You can put your changes into this script, which
>> will never be overwritten by YUM updates:
>>
>> /usr/sausalito/bin/custom-postfix-confgen.sh
>>
>> There is an example in that file that shows how it's done. This script
>> runs at the end of the auto-configure of Postfix that happens during
>> each Postfix restart. So you have full flexibility of how you want to
>> configure that service if you want to tweak it further than the GUI
>> allows.
>>
>> Let me know if you have any further questions and I'd be glad to help.
>>
>> --
>> With best regards
>>
>> Michael Stauber
>> _______________________________________________
>> Blueonyx mailing list
>> Blueonyx at mail.blueonyx.it
>> http://mail.blueonyx.it/mailman/listinfo/blueonyx
>>
>
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