Suppose you have the following A record:
example.com. 3599 IN A 192.0.2.78
And these MX records:
example.com. 997 IN MX 10 mx01.1and1.co.uk.example.
example.com. 997 IN MX 10 mx00.1and1.co.uk.example.
And you then changed the IP address for the A record to a non 1&1 ip address (so that the website could be hosted on an external hosting), would that affect the MX records or mess up the email in any way?
example.com
, then making the change will disrupt your ability to send/receive email. You can work around this issue by setting up a new A record likehost.example.com. 3599 IN A 192.0.2.78
, and then reconfiguring your email client to send/receive email viahost.example.com
instead ofexample.com
.