We apolologize any inconvience caused.

Unfortunately an error, which we could not find despite extensive testing, has crept into this update. That should not have happened.
If the option 'Clear history when Firefox closes' is activated in the Firefox settings 'Privacy' => 'History', the entered account data will also be deleted when closing Firefox. This also applies to all other MailCheck settings.

We are currently working on a new version that fixes this bug. This version will be published on Friday.

Maybe you will like to give MailCheck another chance then.

Thank you for your patience.

Best regards,

Your MailCheck team