Remove unnecessary host lookup

[RiRe]

No description provided.

[mxroute]

You are correct, but I believe it's actually a mistake in the logic. It seems that after loading the mxwebmail TXT record, we're setting it as imap_host regardless of it's presence on the whitelist. Which was actually the reason for that line, but I never followed through. Going to test a bit to confirm that I'm not going back and reading the code wrong, that I'm not forgetting something, and see what the right next move is.

[RiRe]

The whitelist is checked in the other method. You actually resolve the hostname two times currently. I checked that before, because I also suspected that missing check.

[RiRe]

mxlookup/mxlookup.php

Line 138 in 0c8592c

if (in_array($txt_host_ip, $whitelisted_ips)) {