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Old 2 Aug 2018, 06:40 PM   #13
Essential Contributor
Join Date: Nov 2004
Location: France
Posts: 471

give us the january 2018 cached page which contains the same result as now:

Reverse Entries for MX records
OK. All mail servers have reverse DNS entries configured correctly.
Server IP PTR (Reverse) IPs gives US an NL

so... 6 internal MX servers is on a network 1 and the last 2 are on network 2....

one) the 2 networks links collapsed in same time during about 1 hour.... bad luck !

two) if these 8 MX have the same CPU/memory/network links with a weak "margins": if network 1 collapsed more than 18h (6/8 of 24h) with 0 troubles in network 2... lost mail can occurs.

Last edited by vivil : 2 Aug 2018 at 07:06 PM.
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