On 25.10.2011 08:19, Stan Hoeppner wrote:
Clustering of SMTP servers is accomplished by setting equal MX
priority
in DNS for a given domain's MX hosts. For example:
~$ dig mx ibm.com
...
ibm.com. 3600 IN MX 10 e1.ny.us.ibm.com.
ibm.com. 3600 IN MX 10 e3.ny.us.ibm.com.
ibm.com. 3600 IN MX 10 e32.co.us.ibm.com.
ibm.com. 3600 IN MX 10 e2.ny.us.ibm.com.
ibm.com. 3600 IN MX 10 e4.ny.us.ibm.com.
ibm.com. 3600 IN MX 10 e5.ny.us.ibm.com.
ibm.com. 3600 IN MX 10 e6.ny.us.ibm.com.
ibm.com. 3600 IN MX 10 e33.co.us.ibm.com.
ibm.com. 3600 IN MX 10 e35.co.us.ibm.com.
ibm.com. 3600 IN MX 10 e31.co.us.ibm.com.
ibm.com. 3600 IN MX 10 e34.co.us.ibm.com.
This is a cluster of 10 inbound mail servers, though I'm not sure if
they're running Postfix. Wietse maybe can tell us as he works for
IBM.
Sendmail and XMail.
Sendmail is probably more designed for enterprise use.
Best regards,
Morten
