I have 3 servers and 3 IP's.
Server 1 - Static IP - 188.8.131.52 Server 2 - Static IP - 184.108.40.206 Server 3 - Dynamic IP - 333.333.333.333
Server 3 is always assigned the IP
333.333.333.333 because it's the only one left, the two others are, as shown above, static to the two other servers.
Is there any reason to assign
Server 3 a static IP in regards of "credibility" to the "outside world" (Such as in terms of SMTP / Server credibility) despite the server always have and will be identified by the same IP?
Are there other reasons to give
Server 3 a "static IP"?
This is not about SPF / DKIM / Reverse DNS, I'm very well aware of these things and they have been configured. - The question is not about getting unblocked.