Hi,
Can anyone please point me to a list of the most used MTAs (mail
servers) and their market share?
BR
http://www.google.com/search?q=list+of+the+most+used+MTAs&ie=utf-8&oe=utf-8&aq=t&rls=com.frontmotion:en-US:unofficial&client=firefox-aand
http://www.google.com/search?q=MTA+market+share&ie=utf-8&oe=utf-8&aq=t&rls=com.frontmotion:en-US:unofficial&client=firefox-a
According to the Google, the most used MTA is Ez-Pass 
allan
Now, did you want that in terms of "number of copies installed" or
"amount of mail handled"? There's probably zillions of little Fedora and
Ubuntu boxes running whatever MTA came off the disk that are handling 1 or 2
pieces of mail a day, and then there's whatever backends are used by
MSN/Hotmail, Yahoo, AOL, etc. "This MTA packed by weight, not by volume.
Some settling of contents may have occurred during shipping and spamming."
(Seriously - if 95% of the mail out there is spam, then the top 4-5 MTAs are
probably the ratware that's sending out the spam. Something to consider...)
Now, did you want that in terms of "number of copies installed" or
"amount of mail handled"? There's probably zillions of little Fedora
and
Ubuntu boxes running whatever MTA came off the disk that are handling 1
or 2 pieces of mail a day, and then there's whatever backends are used
by MSN/Hotmail, Yahoo, AOL, etc. "This MTA packed by weight, not by
volume.
Some settling of contents may have occurred during shipping and
spamming."(Seriously - if 95% of the mail out there is spam, then the top 4-5
MTAs are probably the ratware that's sending out the spam. Something
to consider...)
In keeping with this concept, and turning it around. What MTA is exposed to the most spam? (1-x) That should tell you what MTA handles the most "good" mail by also being the destination for the most spam (good, live recipients).
Or I could be missing something well known about mail flows.
Deepak
If I had to guess..
Postfix
Sendmail
Exim
ComminigatePro
Beyond those you'd probably see a lot of the free webmail carriers (Gmail,
yahoo, and hotmail/live all use "custom" MTA's) as well as IPSwitch's iMail
and the Windows Server/IIS SMTP service.
-Scott
That's true, especially given the size of the installed base.
So in terms of (a) installations (b) message count (c) message volume
(d) recipient count (e) etc. those ratware programs have got to be so
far ahead of the usual suspects (sendmail, postfix, exim, etc.) that
it's not even a race.
---Rsk
Valdis.Kletnieks@vt.edu writes:
http://www.mailradar.com/mailstat/
Some of the most popular:
1. Sendmail; (24%)
2. Postfix (20%)
3. Qmail (17%)
4. Microsoft Mail
In all fairness, the ratware programs that send out spam are usually
MUAs, not MTAs, [RFC2476].
"Message Transfer Agent (MTA) --
A process which conforms to [SMTP-MTA], which acts as an SMTP server
to accept messages from an MSA or another MTA"
SMTP server installs that do not accept mail from other servers might be MSAs
but are not MTAs.
(The default mail server installed in Fedora doesn't count as a MTA,
unless reconfigured to listen on some network interface, because the
default config only accepts a SMTP connection from a local MUA using
network loopback.)
Please note that this thread has been moderated as off-topic.
The Mail operations email list http://www.mailop.org/ may be a more appropriate venue for the discussion.
Simon
NANOG MLC