Projects / Courier

Courier

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, Webmail, and mailing list services within a single consistent framework. Individual components can be enabled or disabled at will. Courier implements basic Web-based calendaring and scheduling services integrated in the Webmail module.

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Recent releases

  •  24 Dec 2013 01:10

    Release Notes: This release fixes a bug in the webmail server that can be triggered by external filesystem corruption, whereby the server will either be unable to open a folder, or will consume 100% of the CPU.

    •  29 Sep 2013 03:02

      Release Notes: This release adds ratefilter, a rate-limiting mail filter.

      •  15 Apr 2013 03:56

        Release Notes: This release adds support for DNSWLs (DNS-based whitelists, as opposed to blacklists), as well as DNSBL/DNSWL IPv6 support, and improves fallback error recovery when sending mail to a server which claims to support encryption, but actually fails to do so.

        •  05 May 2012 20:52

          Release Notes: This release adds additional configuration and customization options for mail servers with multiple IP addresses.

          •  14 Apr 2011 01:30

            Release Notes: This release fixes a memory corruption bug in the Webmail server and compilation errors when using recent versions of OpenSSL.

            Recent comments

            12 Oct 2007 16:39 cronman

            Re: Courier Problems


            > I would not recommend this software for

            > anyone. It does

            > have a steep learning curve and the

            > support from the author

            > is not very good. Frequently updates to

            > the software break

            > existing installations resulting in

            > hours of work to fix the

            > problem, and the author typically can

            > not help. This software

            > has some plusses, but the lack of good

            > support and frequent

            > problems with upgrades more than cancel

            > those positive

            > aspects.

            Greetings from 2007. Things today appear to be very different from your account of how things were in 2004.

            12 Oct 2007 16:36 cronman

            Highly Recommended
            This is one of the best opensource packages I've had the pleasure of working with, and working with it has been a pleasure.

            Everything you need to run an email system is integrated into one project, no need to mix and match, and the quality of the standard adhesion is second to none as is the quality of the code.

            Bugs, which are few and far between are patched within hours.

            Take a look at the project homepage and look at the extensive documentation and man pages. There is simply nothing about this project that is not documented. There is a lot of reading to be done, but you will find everything you need in the documentation.

            The setup is flexible enough to accomodate any situation.

            I've recently migrated from a cyrus setup, and am very very happy with this new setup. My logs are a lot cleaner and its possible to trace things on the system.

            If you're running your own mailserver, take the time to get up to speed on this one, it'll make life so much easier for you.

            24 Oct 2004 10:15 dmadance

            Courier Problems
            I would not recommend this software for anyone. It does

            have a steep learning curve and the support from the author

            is not very good. Frequently updates to the software break

            existing installations resulting in hours of work to fix the

            problem, and the author typically can not help. This software

            has some plusses, but the lack of good support and frequent

            problems with upgrades more than cancel those positive

            aspects.

            07 Jul 2003 21:06 mrsam

            Re: Migration

            > I had a server configured under Windows,
            > running MDaemon. The thing is that this
            > email server has a feature called
            > DomainPOP, that downloads email from a
            > POP account and then puts each email in
            > the right mailbox.
            > I use this because I'm not 24/7 online,
            > so I have this ISP that gets all the
            > mail for my domain and I download it
            > later.
            > I don't know if I made myself clear, but
            > the question is, as I'm migrating the
            > server to Linux, if Courier has a
            > feature like the one I described, and if
            > it doesn't, is there anyway to do this?
            > Thanks


            This can be done using fetchmail. There is no need to reinvent the wheel.

            19 Jun 2003 09:44 JuanXarg

            Migration
            I had a server configured under Windows, running MDaemon. The thing is that this email server has a feature called DomainPOP, that downloads email from a POP account and then puts each email in the right mailbox.
            I use this because I'm not 24/7 online, so I have this ISP that gets all the mail for my domain and I download it later.
            I don't know if I made myself clear, but the question is, as I'm migrating the server to Linux, if Courier has a feature like the one I described, and if it doesn't, is there anyway to do this?
            Thanks

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