Please find all related records attached.
The IP ending in 5 is the website hostname (which I turn it off sometimes) and the IP ending in 127 is the mail server which is always on.
BTW, in the iRedmail.tips file, the DKIM record is empty. Though I use the amavisd-new showkeys command to see the key (dkim._domainkey.domainname.com.) Also, when I write amavisd-new testkeys, it says invalid public key not available.
Thank you.