How Mailvesper uses your Google data
When you add a Gmail account, Mailvesper asks Google for permission to read and manage your mail (the scope https://mail.google.com/, the only one Google accepts for IMAP and SMTP access) and to know your email address (openid, email). It uses that permission only to show you your mail and to carry out what you ask: reading, marking, moving, deleting, saving drafts and sending.
Everything happens between your computer and Google: APDSoftware does not receive, store, sell or share your mail. Mailvesper’s use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements. Full details in the Privacy Policy; the conditions of use are in the Terms of Service.