Not receiving mail, hosting company's SMTP server IP4 69.72.42.12 in the BL :(

G'Day Guys

I'm a 'newbie' here, but I have subscribed to be notified for a few posts and never received many emails from you.

As you can see from below it is because your hosting companies SMTP server is in the BL at uceprotect.net

11-08-2021 05:40:55 PM SMTP Server: Remote host 69.72.42.12 (m42-12.mailgun.net) found in blacklist at dnsbl-1.uceprotect.net
11-08-2021 05:40:55 PM SMTP Server: Message from 69.72.42.12 (m42-12.mailgun.net) rejected by DNS blacklist filter
11-08-2021 05:40:55 PM SMTP Server: m42-12.mailgun.net (69.72.42.12) connected
11-08-2021 05:40:55 PM N S A 3: SMTP '180' - 'EHLO m42-12.mailgun.net'
11-08-2021 05:40:55 PM N S A 3: SMTP '180' - 'MAIL FROM:<bounce+28bf76.1a6351- [ R E D A C T E D ] @mg.vbforums.com>'
11-08-2021 05:40:55 PM N S A 3: SMTP '180' - 'QUIT'
11-08-2021 05:40:55 PM N S A 3: SMTP '180' - Key 'DELL-R220-1-VM1-WS12 - 20210811180' - Disconnect
11-08-2021 05:40:56 PM SMTP Server: m42-12.mailgun.net (69.72.42.12) disconnected. 0 message[s] received

You should forward this to have them to have the IPV4 removed from the BL, but I think you will find that mailgun has been hacked and spam has been leaking from this IPV4 probably for many years.

This is what happens when you get cheap / free hosting for sites :)