Cyrus + (insert Best MTA here) Suggestions

[lst_hoe01 at kwsoft.de]

Zitat von Ow Mun Heng <Ow.Mun.Heng at wdc.com>:

> Hi all,
>
> 	I'm curious on why I'm seeing more references to postfix (both here and
> on googling) when setting up an email server (scalable/high
> performance/etc).
>
> Michael Nguyen actually states that
> "Postfix + LDAP just was plain faster under stress than Qmail + LDAP and
> Sendmail + LDAP"
>
> I've read in another google find that postfix is at least 3x faster than
> sendmail.
>
> I'm just wondering why that is.

General note on this : Dependant on the special configuration you are testing
anyone of the MTAs can be the fastest. What seams to be the common baseline :
- Postfix is designed to avoid sync writes as much as possible, so if your I/O
system is the bottleneck (as most of the time is) Postfix should be the
fastest.
- Qmail has some drawback by the "one message per recipient" design if your
bandwidth is limited and you relay many multi-recipient mails.
- A careful sendmail/milter setup with a strong machine can be faster then
Qmail/Postfix with traditional store/forward content filter.
- Qmail and Postfix are considered more secure than Sendmail.
- Postfix and Sendmail are more flexibel in adjusting to your sepcial setup.

Your setup (speed of DNS, lookup maps etc.) have more influence than the
difference beetween the MTAs.

>
> Can anyone shed some light?

To find the definitive answer for your setup you have to test yourself.

>
> Also, I've heard that sendmail does not support maildir format natively,
> but I've also heard that one can use procmail to deliver it into maildir
> format.

No Sendmail guru here, but if you use procmail you have lost on the performance
comparsion ;-)

Regards

Andreas
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