On 3/30/2015 5:04 AM, Juha Pesonen wrote: > Postfix tries to send emails via some IP that I haven't recognised > instead of the MX that it should use -> message bounces. But it the > second time it sends to another address of the same domain, it finds > the MX normally and delivers the messages.
Does this happen with just a single domain, or do you have this problem with multiple domains? > Is there some temporary > DNS problems or why does this happen? And what is that mystery IP > 5.153.21.206, if the domain's A record is 108.174.149.227? This > happens randomly and affects to multiple domains. > > Here's a host -command output of the domain: > > $ host customerdomain.fi <http://customerdomain.fi> Lack of evidence makes it impossible to debug further. wild guesses: - the target domain has a badly configured DNS server (single bad domain) - something upstream (ISP? security device? router?) is messing with your DNS responses (multiple bad domains) - your resolver is broken (multiple bad domains) -- Noel Jones
