So to be sure the DNS zone file should contain MX 10 mx1.isp.com MX 10 mx2.isp.com MX 20 mx1.isp.com MX 20 mx2.isp.com
Or MX 10 mx1.isp.com MX 10 mx2.isp.com MX 20 mx1_bkp.isp.com MX 20 mx2_bkp.isp.com also if the "bkp" entries resolve to the same IP's? Markus > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Franco Celli > Sent: Friday, December 24, 2004 10:27 AM > To: [email protected] > Subject: Re: [Declude.JunkMail] OT: MX priorities > > Hi Markus, > I cannot say I'm an expert but as far as I know "it should". > > The configuration you described is not a DNS round robin, > where you tipically assign two or more IPs to same hostname. > In this case the client DNS cache will cause the remote MTA > to connect to a single IP until it expires (In windows you > should reboot the machine). > > In you example you defined two different MX records with same > priority I don't know wich one will be picked up first, it is > also possible you will never achive a 50% load, but if anyone > fails I believe a well programmed DNS/MTA SHOULD connect to the other. > > > --------------- > Franco Celli > > > > ----- Original Message ----- > From: "Markus Gufler" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, December 24, 2004 10:11 AM > Subject: [Declude.JunkMail] OT: MX priorities > > > > I've a question I can't answer by just testing it out on my > MTA because I > > don't know if other MTA's will do the same thing. > > > > If I have 2 front end gateways servers > > > > IP1: 123.123.123.1 > > IP2: 123.123.123.2 > > > > A mx1.isp.com 123.123.123.1 > > A mx2.isp.com 123.123.123.2 > > > > And set up MX-records for domain.com like > > > > MX 10 mx1.isp.com > > MX 10 mx2.isp.com > > > > The DNS ist configured to answer in round robin method. > > So the load should be 50/50 on both servers. > > > > Now the question: should or must a remote MTA try to > connect to the second > > MX 10 host if the first one (also with priority 10) was not > reachable? > > > > Is this a "must have" or could it be that some MTA's from > certain vendors > > will not connect to the second MX? > > > > Thanks in advance > > Markus > > > > --- > [Quipo ISP - Questa E-mail e' stata controllata dal programma > Declude Virus] > [Quipo ISP - This E-mail was scanned for viruses by Declude Virus] > > --- > [This E-mail was scanned for viruses by Declude Virus > (http://www.declude.com)] > > --- > This E-mail came from the Declude.JunkMail mailing list. To > unsubscribe, just send an E-mail to [EMAIL PROTECTED], and > type "unsubscribe Declude.JunkMail". The archives can be found > at http://www.mail-archive.com. > > --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.
