I hope the following makes sense.
I've recently changed the A records and CNAME of my domain to point a server where my site is soon to be hosted. This server is not going to deal with mails, just hosting. The problem is that my mails have stopped working (can't send or receive) because the MX record is set to the updated A record.
I understand that I have to -
1) create a new A record called mail that points to old mail server
2) change the MX record to mail.mysite.com
That seems fine in theory but the problem is that I'm dumb and -
1) I don't know what the original IP address was (letshost.ie has a default of 126.96.36.199, not sure if this is of help)
2) I'm a little confused by what details to put in the A/ MX records
My guess is that in the A record I would put -
Name - mail
Target - whatever the old mail server IP address is
And in the MX record
Name - ? not sure
Target - ? I can't put mail.mysite.com as mysite.com points to the new server.