AtomEmailPro Reply Feature
First, in the settings tab, choose the email sending method: webmail send or SMTP send.
An app password is a 16-digit passcode that allows a less secure app or device to access your Google account. It's used when the app or device doesn't support two-factor authentication (2FA).
To send SMTP emails using a Gmail account, you need to ensure that IMAP and POP3 are enabled. Here’s how to enable them and understand their purpose: