Outbound emails stuck in Categorizer

[MrBean17]

Hello,

Internal email and recieving email are both operable. When sending outbound email, they get stuck in the Queue, and when I track them, it states they are "submitted to Categorizer."

MX/DNS records are correct. Unsure what else can be done.

Some loop like this, some just get stuck on the first Categorizer.

SMTP: Store Driver: Message Submitted from Store
SMTP: Message Submitted to Advanced Queuing
SMTP: Started Message Submission to Advanced Queue
SMTP: Message submitted to Categorizer
SMTP: Started Message Submission to Advanced Queue
SMTP: Message submitted to Categorizer

Thank you