Pamcho wrote: > > Is there any way to make that every mail received by MAILSERVER-B > from anywhere except from MAILSERVER-A was sended to MAILSERVER-A, except > in case of MAILSERVER-A was down? >
Can't you write a script file that sort of monitors your primary server? Let's say you simply ping it every 5 minutes. If the server goes down, (use an IF statement), you just turn on the SMTP engine of the backup MX. Otherwise, the backup MX has its SMTP off. That's a very basic idea, but you could easily make it more complicated if need be. If you don't know how to write such a script, just hire someone who can. Billy > > On Wed, 22 Jun 2005, Billy Newsom wrote: > > >>Pamcho wrote: >> >>> I have the following configuration: >>> >>> >>>MAIL SERVER A: With DSPAM and QMAIL-SCANNER >>>MAIL SERVER B: With all the mailboxes >>> >>> All my domains have >>> >>>MX 10 SERVER-A >>>MX 20 SERVER-B >>> >>> >>> So the mails go to SERVER-A, the are filtered, and then, using >>>smtproutes, sent to SERVER-B. >>> >>> >>> If SERVER-A crashes all the mail go to SERVER-B without filtering, >>>but no mail is lost. >>> >>> If SERVER-B crashes, SERVER-A keeps the mails until SERVER-A goes >>>up. >>> >>> >>> It works great with just one problem: SERVER-B receives mails that >>>no go through SERVER-A. Especially a lot of SPAM. >>> >>> Is there any way to fix that problem? >> >>Definition of a Spammer: someone who attempts to send you mail any way >>he can for any reason. Spammers love to send mail to backup MXes. They >>tend to be naively administered with the misconception that a secondary >>MX will rarely be used, and they don't need the same amount of >>attention. In fact, they are favorite targets of spam. >> >>You need to switch roles of your servers. Put the spam checking on the >>secondary only (via spamassassin, I suppose). You need RBL checking on >>both. That works by rejecting inbound mail at the SMTP conversation. >>See netqmail and other patches to qmail which add in RBL checks. >> >>You need to run antivirus only on the secondary, but it is nice to have >>it on both, in case there is a big virus outbreak. (Some worms will >>send multiple copies to the same server, once they find one.) >> >>You may find out that the primary mail server in your setup can be a >>relatively small machine, and the secondary (with the users POPing or >>IMAPing to it) will need to be the heavy machine. >> >>Or, if you don't need to run your own backup mail server, I know of >>someplace that will do it for just $10 per year! Makes more sense to >>me. What they can also do is provide you with two PRIMARY MXes, and >>then your mail server will not be published at all -- that way, you will >>*never* get spam sent to your server without having gone through theirs >>-- and they run RBLs for you. Also for $10 per year. (It may be free, >>depending on how many domains you have.) >> >>In other words, you could run an unpublished mail server, running on an >>unpublished port 4321, and you will end up with less Spam to begin with. >> (Yes, you will still get spam, just not from some of the major sources >>on the Internet). And the provider will provide you two MXes, each with >>priority 10. >> >>Billy >> ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click _______________________________________________ Qmail-scanner-general mailing list Qmail-scanner-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/qmail-scanner-general
