If you're on UBB.threads 7.7.x, you should look at setting up a DKIM in the "Advanced Mail Configuration" section of UBB.threads (Control Panel > Primary Settings > Advanced Mail Configuration). Then you wont have to jump through hoops that have been put on your specific domain by some email providers which receive email from your website domain.
This was all mentioned in your last post on emails being rejected from your domain -
https://www.ubbcentral.com/forums/u...rum-emails-are-being-rejected#Post262116You really should read through the links previously posted for you in that thread.
Here are some additional links for further reading. It may seem a bit complex at first, but by sharing additional links, I hope that you'll find one site that is able to explain it in a way that helps make sense of it all -- easily. Plus, I hope other readers to this thread may appreciate the additional resources.
Wikipedia -
https://en.wikipedia.org/wiki/DomainKeys_Identified_MailWhat Is DKIM? Everything You Need to Know About Digital Signatures -
https://www.emailonacid.com/blog/ar...u_need_to_know_about_digital_signatures/
