I am sorry to hear you are unable to send email from the Samsung Email app, and can understand the inconvenience. In addition to what @Who_Dis suggested for clearing the app's cache and data (steps here: https://www.samsung.com/us/support/answer/ANS00077611) and submitting an error report (steps here: https://www.samsung.com/my/support/mobile-devices/how-to-submit-an-error-report-on-samsung-members-a...) I suggest also trying Safe Mode. Safe Mode can help determine if a third-party application may be responsible for this behavior. The guide is here: https://www.samsung.com/us/support/answer/ANS00062983/ You can also try clearing your device's cache partition with these steps, which can help improve device behavior: • Ensure the device is powered off. If the device is unresponsive/frozen, press and hold the Power button for approximately 10 seconds or until the device power cycles. • Press and hold the Volume Up button and the Home button. • While continuing to hold the Home and Volume Up buttons, press and hold the Power button until 'RECOVERY BOOTING' appears in the upper left then release all buttons. • Select wipe cache partition. Utilize the Volume Up/Down buttons to highlight and the Power button to select. • Select reboot system now. Option is highlighted, utilize the Power button to select.
