DMS Emails not going out to candidates

Reason for priority:
Description: 

I have testing on ermc and gee group as well, and the DMS invite to candidate is not sent; however, the candidate profile shows the icon with status, and  the candidate history does show the record as well: 

But the candidate does not receive the DMS email. One of the test candidates is - "testxavier@yopmail.com"

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