A. Check the notification settings for mail.com. Go to 'Settings' > 'Apps' > 'mail.com' > 'Notifications' and adjust the settings to your preference, including turning off persistent notifications.

B. Clear the app cache and data. Go to 'Settings' > 'Apps' > 'mail.com' > 'Storage' > 'Clear Cache' and 'Clear Data'. This can help reset notification behavior.