Although I use the right Password I cannot get any connection to my postbox nor can I send any emails. I checked the passwords x times.

If you're certain that the password is correct, the issue may not actually be the password. I would check the incoming and outgoing mail server settings, especially the SMTP authentication settings, port numbers, and whether your email provider requires a separate app password or two-factor authentication. It can also help to remove and re-add the mailbox account, as sometimes an old authentication session or incorrect server configuration can prevent both receiving and sending mail. For people who also spend time looking for PC and mobile app resources, [[Mod APK For PC|Mod APK For PC]] is another topic worth exploring when researching different software and app options.