I think the place I’d start would be checking the email logs for sent and skipped, as well as particular users’ email preferences.
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| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| E-mail notifications when members are mentioned | 7 | 1000 | June 30, 2021 | |
| Not receiving emails when mentioned or when someone replies to a topic I created | 14 | 6844 | February 10, 2022 | |
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| Send Watching email notifications based on ‘post read’ not ‘site seen’ | 5 | 593 | October 1, 2023 |