[EMAIL PROTECTED] writes: > ok..i can install dovecot+postfix+MYSQL..etc..and maybe the problem it's > resolve. > i don't have problem with the machines, the machines are goods, my problem > is the tranparent receive e-mails to the users than are distributed in > four machines with the same number the users and different users in each. > as does google??. they have one entry to e-mail system (gmail.com) but > they have several machine (maybe thousands) in transparent mode. > i read something like LVS...some comment about this software..! is my > solution or I'm lost? > Roberto.-
many ways to do this. The easiest option is to put customers on mail1.isp.com ... have the server at isp.com just have a bunch of aliases pointing [EMAIL PROTECTED] to [EMAIL PROTECTED] ... the disadvantages are that the end users need to know to set their pop/imap clients to maily.isp.com, where y will be different for different users, and your aliases file will get big, and moving users from one mailserver to another gets complicated (usually you put everyone on mail1 until it is almost full, then you put all new users on mail2, until it gets full, etc...) but incoming mail to [EMAIL PROTECTED] will work, and this is by far the easiest to set up and it will scale pretty well. at an ISP where I worked during the .com, we did this, but we wanted all users to go to mail.isp.com to get their mail. we wrote a little C program that listened on port 113 until the pop client issued 'user username' and then did a lookup (in the aliases file, incidentally... this got really slow after we passed a million accounts- I re-wrote it to use MySQL and things performed ok again) to see where the user was and forwarded the rest of the pop3 session to the correct server. Really this is a minor tweak and only saves you the trouble of making your users know which mailserver they need to connect to. Finally, do a search on "Cyrus murder" essentially the cyrus mailserver includes support for clustering your mailservers. It's not redundant (e.g. if you loose a physical server you can loose data) but it performs well, from what I hear. Cyrus is generally considered to be an 'industrial strength' mailserver. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
