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From: Martin on 26 May 2010 15:57
On 26/05/10 16:43, houghi wrote:
> Martin wrote:
>> On 26/05/10 12:56, houghi wrote:
>>> Shmuel Metz wrote:
>>>> OTOH, the last time I look Yast couldn't handle multiple e-mail
>>>> servers.
>>>
>>> And that is a good thing as running several at the same time is
>>> extremely seldom needed. I have no heard about situation where there
>>> might be a need.
>>
>> My wife uses the ISP mail server and the gmail mail server
>
> We are talking about localy installed mailservers, not remote
> mailservers. e.g. postfix and sendmail on the same machine.

OK. My apologies!
From: David Bolt on 27 May 2010 06:40
On Wednesday 26 May 2010 15:43, while playing with a tin of spray paint,
houghi painted this mural:

> Martin wrote:
>> On 26/05/10 12:56, houghi wrote:
>>> Shmuel Metz wrote:
>>>> OTOH, the last time I look Yast couldn't handle multiple e-mail
>>>> servers.
>>>
>>> And that is a good thing as running several at the same time is
>>> extremely seldom needed. I have no heard about situation where there
>>> might be a need.
>>
>> My wife uses the ISP mail server and the gmail mail server
>
> We are talking about localy installed mailservers, not remote
> mailservers.

Maybe. It's possible that Shmuel may have been referring to the mail
server configuration module in YaST2 which configures both outgoing and
incoming mail. It can't configure more than one server from which to
download mail. To do that, you'd need to install and configure
fetchmail. While this isn't exactly hard, some people may have problems
with it.

As an example, my first use of fetchmail was several years ago. I
configured it and then tested it from the console. End results were a
partial success. I did receive some of the mail I was retrieving.
Unfortunately, some of the mail was addressed to unknown users at my
ISPs host and so Sendmail correctly rejected them. This resulted in my
system sending somewhere between 5 and 10 bounces before I could use ^C
to stop it in its tracks. After that, I reconfigured fetchmail, this
time making sure that it would not send bounces and all was well with
the world. Or maybe not. At least I was no longer sending bounces to
the forged senders of mail retrieved by fetchmail that were addressed
to unknown users.

Of course, it's much easier to just use a mail reader that can be
configured to fetch from multiple places. There's little chance of
causing problems for other net users, and the worst you could really do
was to screw it up and not be able to retrieve emails sent to you.

> e.g. postfix and sendmail on the same machine.

Unless they are installed in separate installations, either in virtual
machines or on a multi-boot system, or you force rpm to ignore the
conflicts, you can't install Sendmail and Postfix together. Just like
you can't install Exim with either Sendmail or Postfix present due to
dependencies.


Regards,
David Bolt

--
Team Acorn: www.distributed.net OGR-NG @ ~100Mnodes RC5-72 @ ~1Mkeys/s
openSUSE 11.0 32b | | | openSUSE 11.3M4 32b
| openSUSE 11.1 64b | openSUSE 11.2 64b |
TOS 4.02 | openSUSE 11.1 PPC | RISC OS 4.02 | RISC OS 3.11
From: David Bolt on 27 May 2010 10:55
On Thursday 27 May 2010 14:19, while playing with a tin of spray paint,
houghi painted this mural:

> David Bolt wrote:
>> As an example, my first use of fetchmail was several years ago.
>
> fetchmail is not a mail server. ;-)

I know.

>>> e.g. postfix and sendmail on the same machine.
>>
>> Unless they are installed in separate installations, either in virtual
>> machines or on a multi-boot system, or you force rpm to ignore the
>> conflicts, you can't install Sendmail and Postfix together. Just like
>> you can't install Exim with either Sendmail or Postfix present due to
>> dependencies.
>
> That is more in place in a language group. On a technical basis those
> are different machines and you know it.

Precisely. You can't have more than a single mail server package, for
instance Sendmail and Postfix, installed at a time because they
conflict. Some of the binaries that each package contains share the
same name, so it would make a mess of things to force their
installation.

If you compile and install your own servers from their sources, you can
have both installed as long as you make sure the installation paths are
not the same, e.g. by installing both in a named directory under /opt .
If you're doing that, you should be quite capable of configuring them
both to work together.


Regards,
David Bolt

--
Team Acorn: www.distributed.net OGR-NG @ ~100Mnodes RC5-72 @ ~1Mkeys/s
openSUSE 11.0 32b | | | openSUSE 11.3M4 32b
| openSUSE 11.1 64b | openSUSE 11.2 64b |
TOS 4.02 | openSUSE 11.1 PPC | RISC OS 4.02 | RISC OS 3.11

From: David Bolt on 27 May 2010 19:28
On Thursday 27 May 2010 23:03, while playing with a tin of spray paint,
houghi painted this mural:

> David Bolt wrote:
>> Precisely. You can't have more than a single mail server package, for
>> instance Sendmail and Postfix, installed at a time because they
>> conflict. Some of the binaries that each package contains share the
>> same name, so it would make a mess of things to force their
>> installation.
>
> Well, you could have one running on port 25 and the other on 465 as
> SMTPS, but there would not be a real advantage of doing that.
> Or trying to seperate incoming and outgoing in some way.

You would still need to overcome the fact that the sendmail and postfix
packages contain the at least one file of the same name, e.g.
/usr/sbin/sendmail , and so without forcing one of them to be relocated
upon installation, the files from one will break the other. End results
will be that the package that was installed first won't work because
its files will have been overwritten.

>> If you compile and install your own servers from their sources, you can
>> have both installed as long as you make sure the installation paths are
>> not the same, e.g. by installing both in a named directory under /opt .
>> If you're doing that, you should be quite capable of configuring them
>> both to work together.
>
> Sure, nice thing to as a project as a proof of concept, but that is
> where it ends.

Definitely. I wouldn't even begin to try it out as the effort involved
just wouldn't be worth it. No one with any sense would install the pair
of them so they could run at the same time.


Regards,
David Bolt

--
Team Acorn: www.distributed.net OGR-NG @ ~100Mnodes RC5-72 @ ~1Mkeys/s
openSUSE 11.0 32b | | | openSUSE 11.3M4 32b
| openSUSE 11.1 64b | openSUSE 11.2 64b |
TOS 4.02 | openSUSE 11.1 PPC | RISC OS 4.02 | RISC OS 3.11

From: Shmuel Metz on 30 May 2010 12:25
In <slrnhvtr15.69e.houghi(a)penne.houghi>, on 05/28/2010
at 12:03 AM, houghi <houghi(a)houghi.org.invalid> said:

>Well, you could have one running on port 25 and the other on 465 as
>SMTPS, but there would not be a real advantage of doing that.

There is an advantage if you're trying to compare various mail
servers.

--
Shmuel (Seymour J.) Metz, SysProg and JOAT <http://patriot.net/~shmuel>

Unsolicited bulk E-mail subject to legal action. I reserve the
right to publicly post or ridicule any abusive E-mail. Reply to
domain Patriot dot net user shmuel+news to contact me. Do not
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