RE: Load balancing outgoing mail relay

2007-01-17 Thread Michael K. Smith - Adhost
Hello: > -Original Message- > From: [EMAIL PROTECTED] [mailto:owner-freebsd- > [EMAIL PROTECTED] On Behalf Of freebsd > Sent: Wednesday, January 17, 2007 2:34 AM > To: FreeBSD Questions > Subject: Load balancing outgoing mail relay > > Hi > I have a simple question but googling does not

Re: Load balancing outgoing mail relay

2007-01-17 Thread Noel Jones
On 1/17/07, Charles Trevor <[EMAIL PROTECTED]> wrote: What happens if you do multiple dig/nslookups for smarthost.domain.tld. Are the records returned in a different order each time? If not the problem may be at the NS. Nope. Postfix shuffles equal-weight MX records internally, so it doesn't

Re: Load balancing outgoing mail relay

2007-01-17 Thread Charles Trevor
freebsd wrote: This (multiple A records) works for me, at least approximately. Both Bind and MS DNS will round robin when multiple A records exist for the same hostname. What is your setup? FreeBSD 6.2 with Sendmail (initially) and now postfix. MS DNS with round robin (and TTL set to 0 on the r

Re: Load balancing outgoing mail relay

2007-01-17 Thread Noel Jones
FreeBSD 6.2 with Sendmail (initially) and now postfix. MS DNS with round robin (and TTL set to 0 on the records). Resolving with nslookup gives something like: smarthost.domain.tld 192.168.0.1, 192.168.0.2, 192.168.0.3 If I kill 192.168.0.1 then it goes on the second one. But this is failover, a

Re: Load balancing outgoing mail relay

2007-01-17 Thread freebsd
This (multiple A records) works for me, at least approximately. Both Bind and MS DNS will round robin when multiple A records exist for the same hostname. What is your setup? FreeBSD 6.2 with Sendmail (initially) and now postfix. MS DNS with round robin (and TTL set to 0 on the records). Resolvi

Re: Load balancing outgoing mail relay

2007-01-17 Thread Charles Trevor
freebsd wrote: Hi I have a simple question but googling does not lead to a valid/usable answer. I need to load balance OUTGOING emails. I have serveral smart hosts. I need my internal SMTP server to send mail using ALL of the smart hosts together, making some kind of load balancing (no need fo