Not a bad idea to have a mail system replicated itself to multiple sites. BUT ... How are you going to have the clients log on to primary/secondary mail-server? Trough DNS lookup? Last time we did a IP change for a web-server; it took 5 whole days before this change was propagandated worldwide(or some word spoken like this). Can you believe this? 5 days with std TTL's (ISP saying - I didn't believed them). How are you gone log user-permission changes, user-setting-changes, etc and have these replicated? How are you gone know which server is 'authoritive' for above changes? In the commercial world there are known solutions, but look at the overhead this creates - logging, syncing, replicating, syncing, logging. And these options are payed (very) well for...
I'd say go ahead! If I could be of any help let's have a word (or two). Frederik -----Oorspronkelijk bericht----- Van: Matic [mailto:[EMAIL PROTECTED]] Verzonden: dinsdag 1 oktober 2002 7:32 Aan: [EMAIL PROTECTED] Onderwerp: [xmail] Re: Secondary server >there no such a thing of POP3 backup Yes of course, I know that. I would like to use the ability of Xmail server to change the configuration on the fly - as needed. I will have a script that will control the access to primary server and replicate the files for mailboxes, users, domains,.. through some sort of secure FTP. When the primary server fails (not the XMail itself, but ISP or something else), the script will apply the changes to the DNS and secondary XMail coniguration files so that the secondary server will take over thoe role of the primary. There will also be some log to know which mailbox files were created on the primary and which on the secondary server, so that when primary server comes up the replication in other direction will occour as well as changes to the DNS and secondary XMail server. Any ideas why this wouldn't work? What else must I take care of? Has anyone tried this before? Matic ----- Original Message ----- From: "Davide Libenzi" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: 30. september 2002 21:38 Subject: [xmail] Re: Secondary server > > On Mon, 30 Sep 2002, Matic wrote: > > > Hi all, > > > > I have curently 2 Xmail servers, (primary and secondary). SMTP > > backup is now acchived with MX records. > > These 2 servers are on a different physical locations and have 2 different ISP. In the previous month we had on the primary location 2 blackouts. One was due to a long power failure (20h) which our UPS couldn't suplement, and one was due to failure in the main switch of our primry ISP. SMTP part was correctly backud up with coresponding MX records in the DNS, but our clients couldn't fetch the mail from there. > > > > Has anyone implemented a "POP3 backup" for the mail? I mean complete backup, so that the clients wouldn't notice the difference when they are connected through primary or secondary server. Has anyone configured anything like this or does somebody have an advise how to acchive this? > > there no such a thing of POP3 backup because users connect directly to > the POP3 machine and the way the secondary MX server works is to > forward all messages to the main server. so it usually does not have > local mailboxes. > > > > - Davide > > > - > To unsubscribe from this list: send the line "unsubscribe xmail" in > the body of a message to [EMAIL PROTECTED] For general help: > send the line "help" in the body of a message to > [EMAIL PROTECTED] > - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
