>It might not unless the definition is really stretched. It's not data collected about you.
It's quite obviously personal data within the definitions used in GDPR. It's information that can be related to a natural person; those two criteria are the only criteria that must be satisfied for data to be regulated under the GDPR.
https://gdpr-info.eu/art-4-gdpr/
>Otherwise every email some employee sends discussing this situation would also need to be included.
Yep. If the contents of those emails can be related to a natural living person by any identifier (name, username, email address, account number etc) then it's personal data.