''<p>regie [[#question-1561448|said]]</p>'' <blockquote>Hello, Sorry to write here, but I have this recurring problem and cannot find a solution. Some of the addresses I write to regularly end up automatically in spam. I have tried various solutions, and they work for a while, but then they go back to spam. In addition, I have several spam folders, including one that can be deleted. But it also comes back automatically. Thank you for your help. Best regards, Y. </blockquote> Do you mean that messages you send go to recipients' Spam folders, or messages you receive are mistakenly sent to your Spam folder? In either case, it's recommended to access the account in webmail and unblock or whitelist allowed senders. https://support.mozilla.org/en-US/questions/1404881 If a folder such as Spam is defined on the mail server, i.e. it's a 'system folder', don't try to delete it, but unsubscribe it (right-click account in Folder Pane, Subscribe...).