Re: [courier-users] How do I limit one domain so emails can only be sent to/from a single address?
On Tue, Jan 07, 2003 at 11:57:21PM -0500, Tobias Eigen wrote: Hi all, I have an unusual circumstance and would be grateful for help. I've checked the FAQ and other docs and haven't found the answer. I need to configure a domain on my qmail/courier system so that all mailboxes on that domain can only send/receive mail to/from a single email address. Other domains should remain the same. Is this possible? A POP3/IMAP server doesn't send or receive mail.[*] If you are using qmail as your MTA, and courier-imap for POP3/IMAP access to a mailbox, then this is a qmail question and belongs on a different list. Regards, Brian. [*] OK, excluding some strange and rare extensions/hacks. Many thanks, Tobias Tobias Eigen [EMAIL PROTECTED] Kabissa - space for change in Africa http://www.kabissa.org --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
RE: [courier-users] How do I limit one domain so emails can only be sent to/from a single address?
Hi Brian, Thanks for the response. I'm having trouble seeing how this can be done on a domain basis in qmail - and was hoping there would be a solution/hack based on courier. Meanwhile, I haven't gotten a response from the qmail list yet. I'd like to get to the bottom of this, so if anyone has any suggestions please let me know. In case you're curious, the purpose of this unusual setup is to enable third world scientists and researchers to gain access to electronic journal websites via email. It works well for people that have their own email client, but not for those that use Hotmail or Yahoo.. Which, as it turns out, is a significant proportion of our users. Both of these services mangle the pages delivered through our service. The hope is to help these people by providing them with a simple webmail interface only for accessing the journals. More info here: http://www.ictp.trieste.it/ejournals/ Best wishes, Tobias Tobias Eigen [EMAIL PROTECTED] Kabissa - space for change in Africa http://www.kabissa.org -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Brian Candler Sent: Wednesday, January 08, 2003 7:41 AM To: Tobias Eigen Cc: [EMAIL PROTECTED] Subject: Re: [courier-users] How do I limit one domain so emails can only be sent to/from a single address? On Tue, Jan 07, 2003 at 11:57:21PM -0500, Tobias Eigen wrote: Hi all, I have an unusual circumstance and would be grateful for help. I've checked the FAQ and other docs and haven't found the answer. I need to configure a domain on my qmail/courier system so that all mailboxes on that domain can only send/receive mail to/from a single email address. Other domains should remain the same. Is this possible? A POP3/IMAP server doesn't send or receive mail.[*] If you are using qmail as your MTA, and courier-imap for POP3/IMAP access to a mailbox, then this is a qmail question and belongs on a different list. Regards, Brian. [*] OK, excluding some strange and rare extensions/hacks. Many thanks, Tobias Tobias Eigen [EMAIL PROTECTED] Kabissa - space for change in Africa http://www.kabissa.org --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
Re: [courier-users] How do I limit one domain so emails can only be sent to/from a single address?
On Wed, Jan 08, 2003 at 08:50:51AM -0500, Tobias Eigen wrote: Thanks for the response. I'm having trouble seeing how this can be done on a domain basis in qmail - and was hoping there would be a solution/hack based on courier. Courier (IMAP) doesn't have any way to affect mail delivery: the message simply appears in the Maildir, delivered by the MTA. There is another component of the Courier system, 'maildrop', which does filtering of mail before dropping it into the Maildir. You could try installing this, and configuring qmail to use maildrop for delivery instead of dropping messages straight into the Maildir. My own preferred MTA is Exim and it's possible to configure just about any access policy or restriction you like, if you're prepared to play with its string expansion language. In case you're curious, the purpose of this unusual setup is to enable third world scientists and researchers to gain access to electronic journal websites via email. It works well for people that have their own email client, but not for those that use Hotmail or Yahoo.. Which, as it turns out, is a significant proportion of our users. Both of these services mangle the pages delivered through our service. The hope is to help these people by providing them with a simple webmail interface only for accessing the journals. More info here: http://www.ictp.trieste.it/ejournals/ I have some experience in doing that sort of thing (via UUCP links). What I don't understand is, the above link seems to describe a service which lets you retrieve web pages via E-mail. Anyone who is a hotmail/yahoo/ sqwebmail user clearly has direct web access anyway, so what is the benefit to them of using this gateway? Regards, Brian. --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
RE: [courier-users] How do I limit one domain so emails can only be sent to/from a single address?
Hi Brian, It does seem a bit wonky but these are journals that usually require an expensive subscription that third world researchers can't afford. The university of Trieste has negotiated a special deal which essentially extends their own site license to registered users of their specially configured www4mail web-to-email service. There may be other technical solutions, but this one works with the existing arrangement with the publishers of these thousands of online journals. I'd really like to find a simple solution that allows me to leave the rest of my server configuration untouched (we have 500 domains hosted here and several very large mailing lists) but limit the capability of one domain's users to send email to addresses other than the www4mail address. Another thought is that we've been planning for some time to install some type of spam protection on our server. Would it be feasible/useful to think of doing this at the same time? Thanks again for your advice. Cheers, Tobias Tobias Eigen [EMAIL PROTECTED] Kabissa - space for change in Africa http://www.kabissa.org -Original Message- From: Brian Candler [mailto:[EMAIL PROTECTED]] Sent: Wednesday, January 08, 2003 9:45 AM To: Tobias Eigen Cc: [EMAIL PROTECTED] Subject: Re: [courier-users] How do I limit one domain so emails can only be sent to/from a single address? On Wed, Jan 08, 2003 at 08:50:51AM -0500, Tobias Eigen wrote: Thanks for the response. I'm having trouble seeing how this can be done on a domain basis in qmail - and was hoping there would be a solution/hack based on courier. Courier (IMAP) doesn't have any way to affect mail delivery: the message simply appears in the Maildir, delivered by the MTA. There is another component of the Courier system, 'maildrop', which does filtering of mail before dropping it into the Maildir. You could try installing this, and configuring qmail to use maildrop for delivery instead of dropping messages straight into the Maildir. My own preferred MTA is Exim and it's possible to configure just about any access policy or restriction you like, if you're prepared to play with its string expansion language. In case you're curious, the purpose of this unusual setup is to enable third world scientists and researchers to gain access to electronic journal websites via email. It works well for people that have their own email client, but not for those that use Hotmail or Yahoo.. Which, as it turns out, is a significant proportion of our users. Both of these services mangle the pages delivered through our service. The hope is to help these people by providing them with a simple webmail interface only for accessing the journals. More info here: http://www.ictp.trieste.it/ejournals/ I have some experience in doing that sort of thing (via UUCP links). What I don't understand is, the above link seems to describe a service which lets you retrieve web pages via E-mail. Anyone who is a hotmail/yahoo/ sqwebmail user clearly has direct web access anyway, so what is the benefit to them of using this gateway? Regards, Brian. --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
Re: [courier-users] How do I limit one domain so emails can only be sent to/from a single address?
On Wed, Jan 08, 2003 at 11:56:05AM -0500, Tobias Eigen wrote: It does seem a bit wonky but these are journals that usually require an expensive subscription that third world researchers can't afford. The university of Trieste has negotiated a special deal which essentially extends their own site license to registered users of their specially configured www4mail web-to-email service. Ah, a layer 9 problem - I should have thought of that :-) I'd really like to find a simple solution that allows me to leave the rest of my server configuration untouched (we have 500 domains hosted here and several very large mailing lists) but limit the capability of one domain's users to send email to addresses other than the www4mail address. You say 'courier' but presumably it's sqwebmail that you are using? If so there is another partial solution: sqwebmail calls a shell script 'sendit.sh' when it wants to send a mail, so you could modify that script to enforce your policy. That would give you control of outbound, but not inbound. Otherwise, if you don't want to replace qmail as your MTA, then you will have to work out how to alter qmail (not courier) to do what you want. Another thought is that we've been planning for some time to install some type of spam protection on our server. Would it be feasible/useful to think of doing this at the same time? Another qmail issue. You could see if you can integrate it with spamassassin (www.spamassassin.org). Regards, Brian. --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
RE: [courier-users] How do I limit one domain so emails can only be sent to/from a single address?
Hi Brian, Layer 9? I'm not familiar with that phrase. Please educate me! :-) I'm currently using squirrelmail (http://www.squirrelmail.org) as the webmail interface, courier imap and qmail. Glad to discuss the possibilities for using other webmail clients if it makes sense. I've never managed to test and use sqwebmail on this system. I'll check out SpamAssassin more closely - perhaps that's where the answer lies. Cheers, Tobias Tobias Eigen [EMAIL PROTECTED] Kabissa - space for change in Africa http://www.kabissa.org -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Brian Candler Sent: Wednesday, January 08, 2003 12:43 PM To: Tobias Eigen Cc: [EMAIL PROTECTED] Subject: Re: [courier-users] How do I limit one domain so emails can only be sent to/from a single address? On Wed, Jan 08, 2003 at 11:56:05AM -0500, Tobias Eigen wrote: It does seem a bit wonky but these are journals that usually require an expensive subscription that third world researchers can't afford. The university of Trieste has negotiated a special deal which essentially extends their own site license to registered users of their specially configured www4mail web-to-email service. Ah, a layer 9 problem - I should have thought of that :-) I'd really like to find a simple solution that allows me to leave the rest of my server configuration untouched (we have 500 domains hosted here and several very large mailing lists) but limit the capability of one domain's users to send email to addresses other than the www4mail address. You say 'courier' but presumably it's sqwebmail that you are using? If so there is another partial solution: sqwebmail calls a shell script 'sendit.sh' when it wants to send a mail, so you could modify that script to enforce your policy. That would give you control of outbound, but not inbound. Otherwise, if you don't want to replace qmail as your MTA, then you will have to work out how to alter qmail (not courier) to do what you want. Another thought is that we've been planning for some time to install some type of spam protection on our server. Would it be feasible/useful to think of doing this at the same time? Another qmail issue. You could see if you can integrate it with spamassassin (www.spamassassin.org). Regards, Brian. --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
Re: [courier-users] How do I limit one domain so emails can only be sent to/from a single address?
On Wed, Jan 08, 2003 at 01:19:59PM -0500, Tobias Eigen wrote: Hi Brian, Layer 9? I'm not familiar with that phrase. Please educate me! :-) See: http://ftp.cs.indiana.edu/pub/oracle/08/0883 (actually I was wrong, it's really a layer 8 issue :-) I'm currently using squirrelmail (http://www.squirrelmail.org) as the webmail interface, courier imap and qmail. Ah right. Then squirrelmail will either be sending mail using SMTP, or by invoking the local MTA directly. Either apply your policy at the MTA, or modify squirrelmail itself. The outgoing mails won't even touch your Courier-IMAP installation. Regards, Brian. --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
[courier-users] How do I limit one domain so emails can only be sent to/from a single address?
Hi all, I have an unusual circumstance and would be grateful for help. I've checked the FAQ and other docs and haven't found the answer. I need to configure a domain on my qmail/courier system so that all mailboxes on that domain can only send/receive mail to/from a single email address. Other domains should remain the same. Is this possible? Many thanks, Tobias Tobias Eigen [EMAIL PROTECTED] Kabissa - space for change in Africa http://www.kabissa.org --- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com ___ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
