I have to remove certain users almost everyday from the bounce list, please fix

I have to remove certain users almost everyday from the bounce list, yet others in our company I never have to remove. It's not on our side. I've sent in several requests for help on this with NO RESOLUTION. This is very frustrating. 

Users I have to remove on a regular basis.

brock.lamoeeaux@crengland.com

chris.driskill@crengland.com

heidi.olsen@crengland.com

tori.richins@crengland.com

Users that don't have to be removed

Tricia.oneal@crengland.com

ruth.montoya@crengland.com

Heidi Olsen

CR England

heidi.olsen@crengland.com

801 977 5792

I check the emails you provided and currently it is not on our bounce list. I checked your other thread regarding this similar issue and I noticed that one of the email that was added to the bounce list was due to banned IP.

Whitelisting our IP address might solve the issue. Have you tried to whitelisting our mail servers IP addresses on your mail server? You can find the complete list here: Whitelisting JotMails IP Addresses. For more information, you can also check this article: How to Prevent Email Bouncing Related Issues.