Renaud Allard wrote:
Example 1:When I got my 2 new servers for my personal purpose, they were allocated 2 physical addresses and 2 virtual ones using CARP in a load balancing scheme. For an unknown reason the 2 physical addresses were wrongly listed at sorbs as dynamic IPs. So I thought on sending through virtual IPs, and put one virtual IP for outgoing on each host. The problem being the two IPs were using CARP in load balancing mode, so using a hash for the routes. This meant that 1 IP on 2 were unreachable from one particular host and the same for the other host but reversed. If I could have rotated on both IPs, I wouldn't have noticed the problem with CARP and there would have been no overly delayed mail.
This further confirms my example 1 as some people are caching DNS much more than they should as my 2 servers static IPs have been removed from sorbs for weeks:
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
[EMAIL PROTECTED]
SMTP error from remote mail server after RCPT TO:<[EMAIL PROTECTED]>:
host mail.etherboy.com [216.158.54.130]: 550-rejected:
206.251.244.95 is listed in dul.dnsbl.sorbs.net
550 Dynamic IP Addresses See:
http://www.sorbs.net/lookup.shtml?206.251.244.95
smime.p7s
Description: S/MIME Cryptographic Signature
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