Re: [Dovecot] Proprietary mail storage.
Am 31.08.2011 16:24, schrieb Alex Cherniak: I have a large existing read-only collection of mails packaged in individual zip files as rfc822 file+some additional info. Is it possible (and how difficult) to create a proprietary plugin (like gzip) which will open a zip file, extract mail and pass it back to Dovecot? Where do I start? If plugin is not the right approach, what is? Another question is how will this affect Dovecot performance and how to avoid any significant degradation. Any help is appreciated.Thanks. did you looked at http://wiki2.dovecot.org/Plugins/Zlib ? -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
Re: [Dovecot] Proprietary mail storage.
On 31.8.2011, at 17.24, Alex Cherniak wrote: I have a large existing read-only collection of mails packaged in individual zip files as rfc822 file+some additional info. Is it possible (and how difficult) to create a proprietary plugin (like gzip) which will open a zip file, extract mail and pass it back to Dovecot? Where do I start? If plugin is not the right approach, what is? Is it otherwise a Maildir? If yes, you could base your code on the zlib plugin, or perhaps more easily you could use mail-filter plugin: http://dovecot.org/patches/2.0/mail-filter.tar.gz With mail-filter you can basically just put the messages through whatever program/script you want which gets the mail as input and outputs the wanted message body. I think the v2.0 mail-filter had some (potential?) bug, v2.1 mail-filter is anyway redesigned and should work perfectly. Another question is how will this affect Dovecot performance and how to avoid any significant degradation. I doubt it's going to be a problem.
Re: [Dovecot] Proprietary mail storage.
Am 31.08.2011 16:52, schrieb Timo Sirainen: On 31.8.2011, at 17.24, Alex Cherniak wrote: I have a large existing read-only collection of mails packaged in individual zip files as rfc822 file+some additional info. Is it possible (and how difficult) to create a proprietary plugin (like gzip) which will open a zip file, extract mail and pass it back to Dovecot? Where do I start? If plugin is not the right approach, what is? Is it otherwise a Maildir? If yes, you could base your code on the zlib plugin, or perhaps more easily you could use mail-filter plugin: http://dovecot.org/patches/2.0/mail-filter.tar.gz are there any examples or how too online for mail-filter ? With mail-filter you can basically just put the messages through whatever program/script you want which gets the mail as input and outputs the wanted message body. I think the v2.0 mail-filter had some (potential?) bug, v2.1 mail-filter is anyway redesigned and should work perfectly. Another question is how will this affect Dovecot performance and how to avoid any significant degradation. I doubt it's going to be a problem. -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
Re: [Dovecot] Proprietary mail storage.
On 31.8.2011, at 18.04, Robert Schetterer wrote:
Is it otherwise a Maildir? If yes, you could base your code on the zlib
plugin, or perhaps more easily you could use mail-filter plugin:
http://dovecot.org/patches/2.0/mail-filter.tar.gz
are there any examples or how too online for mail-filter ?
For compiling look at the beginning of mail-filter-plugin.c
For using add it to mail_plugins and:
plugin {
mail_filter_executable = /path/to/your/script.sh
}
A script could be for example (totally insecure and broken):
#!/bin/sh
sed s/Hello/Hi/ /tmp/foo
cat /tmp/foo
rm /tmp/foo
Unfortunately you can't both read stdin and write to stdout at the same time
because of some internal Dovecot problems with it. So you'll have to write it
to a temp file and then output that after the entire input is read.
Re: [Dovecot] Proprietary mail storage.
Am 31.08.2011 17:14, schrieb Timo Sirainen:
On 31.8.2011, at 18.04, Robert Schetterer wrote:
Is it otherwise a Maildir? If yes, you could base your code on the zlib
plugin, or perhaps more easily you could use mail-filter plugin:
http://dovecot.org/patches/2.0/mail-filter.tar.gz
are there any examples or how too online for mail-filter ?
For compiling look at the beginning of mail-filter-plugin.c
For using add it to mail_plugins and:
plugin {
mail_filter_executable = /path/to/your/script.sh
}
A script could be for example (totally insecure and broken):
#!/bin/sh
sed s/Hello/Hi/ /tmp/foo
cat /tmp/foo
rm /tmp/foo
Unfortunately you can't both read stdin and write to stdout at the same time
because of some internal Dovecot problems with it. So you'll have to write it
to a temp file and then output that after the entire input is read.
sorry for silly question
is there any known typical usage for that , or was this on the wishlist
to solve some stuff ?
--
Best Regards
MfG Robert Schetterer
Germany/Munich/Bavaria
Re: [Dovecot] Proprietary mail storage.
On 31.8.2011, at 18.17, Robert Schetterer wrote: Is it otherwise a Maildir? If yes, you could base your code on the zlib plugin, or perhaps more easily you could use mail-filter plugin: http://dovecot.org/patches/2.0/mail-filter.tar.gz are there any examples or how too online for mail-filter ? .. sorry for silly question is there any known typical usage for that , or was this on the wishlist to solve some stuff ? It was originally written to be used with imapc (imap proxy) backend. You could use it for stuff like decode encrypted PGP mails or scan for viruses and drop them if found.
Re: [Dovecot] Proprietary mail storage.
Am 31.08.2011 17:21, schrieb Timo Sirainen: On 31.8.2011, at 18.17, Robert Schetterer wrote: Is it otherwise a Maildir? If yes, you could base your code on the zlib plugin, or perhaps more easily you could use mail-filter plugin: http://dovecot.org/patches/2.0/mail-filter.tar.gz are there any examples or how too online for mail-filter ? .. sorry for silly question is there any known typical usage for that , or was this on the wishlist to solve some stuff ? It was originally written to be used with imapc (imap proxy) backend. You could use it for stuff like decode encrypted PGP mails that sounds like a very good idea or scan for viruses and drop them if found. ok , thats solved i another way at my setup, but nice to have great idea anyway, thx for coding -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
Re: [Dovecot] Proprietary mail storage.
Thanks, Timo. Technically, it's not a Maildir, but my plan is to re-create one with folders containing hard or symbolic links pointing to the real storage. Is it going to be a problem? On Wed, Aug 31, 2011 at 10:52 AM, Timo Sirainen t...@iki.fi wrote: On 31.8.2011, at 17.24, Alex Cherniak wrote: I have a large existing read-only collection of mails packaged in individual zip files as rfc822 file+some additional info. Is it possible (and how difficult) to create a proprietary plugin (like gzip) which will open a zip file, extract mail and pass it back to Dovecot? Where do I start? If plugin is not the right approach, what is? Is it otherwise a Maildir? If yes, you could base your code on the zlib plugin, or perhaps more easily you could use mail-filter plugin: http://dovecot.org/patches/2.0/mail-filter.tar.gz With mail-filter you can basically just put the messages through whatever program/script you want which gets the mail as input and outputs the wanted message body. I think the v2.0 mail-filter had some (potential?) bug, v2.1 mail-filter is anyway redesigned and should work perfectly. Another question is how will this affect Dovecot performance and how to avoid any significant degradation. I doubt it's going to be a problem.
Re: [Dovecot] Proprietary mail storage.
Should work fine. On 31.8.2011, at 22.19, Alex Cherniak wrote: Thanks, Timo. Technically, it's not a Maildir, but my plan is to re-create one with folders containing hard or symbolic links pointing to the real storage. Is it going to be a problem? On Wed, Aug 31, 2011 at 10:52 AM, Timo Sirainen t...@iki.fi wrote: On 31.8.2011, at 17.24, Alex Cherniak wrote: I have a large existing read-only collection of mails packaged in individual zip files as rfc822 file+some additional info. Is it possible (and how difficult) to create a proprietary plugin (like gzip) which will open a zip file, extract mail and pass it back to Dovecot? Where do I start? If plugin is not the right approach, what is? Is it otherwise a Maildir? If yes, you could base your code on the zlib plugin, or perhaps more easily you could use mail-filter plugin: http://dovecot.org/patches/2.0/mail-filter.tar.gz With mail-filter you can basically just put the messages through whatever program/script you want which gets the mail as input and outputs the wanted message body. I think the v2.0 mail-filter had some (potential?) bug, v2.1 mail-filter is anyway redesigned and should work perfectly. Another question is how will this affect Dovecot performance and how to avoid any significant degradation. I doubt it's going to be a problem.
