It sounds like you're getting emails from your old hoster, so you'd need to contact them. Let's Encrypt doesn't send expiration warning emails anymore.
Related topics
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Getting email about Let's Encrypt expiry but my host autorenews | 5 | 1174 | January 24, 2019 | |
| [solved~ish] Expiry Bot - Got notified about someone else's domain names | 4 | 1666 | April 4, 2017 | |
| I get hundreds of spam emails by Let's Encrypt | 28 | 3769 | April 15, 2021 | |
| Spam emails of certificate expiration notice for fake domains | 11 | 3034 | December 24, 2018 | |
| Let's Encrypt certificate expiration notice for domain "..." | 11 | 2513 | November 28, 2017 |