What is the recommended process on cleaning user accounts?

[Helmuts]

Good morning,

What is the recommended process on cleaning user accounts? Last April I acquired 2 old forums (est. in 2001 and 2004) and need to clean the users so that we can start sending monthly DMs (newsletters with industry updates) to our users, and maintaining low email bounce-rate.

Received an interesting suggestion:

eva2000 said:
you don't need to delete those users, just disable email sending to those users after you determine and clean your users' email addresses.
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What is the recommended process on cleaning user accounts?

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