![enable fmail with insecure apps enable fmail with insecure apps](https://manual.limesurvey.org/images/d/df/Complete_local_survey_bounce_settings_-_example.png)
The second shows where I've set up the outgoing server to use it.
![enable fmail with insecure apps enable fmail with insecure apps](https://www.datarepairtools.com/blog/wp-content/uploads/2021/03/apple-mail-not-syncing-with-gmail-4.png)
The first is under 'Server Settings' for incoming. Below is are two images showing where Connection Security: 'OAuth2' setting is selected. If you use IMAP then you can choose to use it. OAUTH2 is not used with POP mail accounts. So when you next logon to gmail, it is using that unique OAuth ID instead of password. Once you have signed in, Google issues you a special OAuth2 token which is saved in Thunderbird and can be seen in the same place as passwords. When you initially logon with OAuth2, you will be redirect to Google’s sign-in page.
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In thunderbird, gmail Imap mail accounts can connect using OAuth2 instead of SSL/TLS. So what it means is gmail's meaning of LessSecureApp is basically anything that doesn’t use OAuth2. Google/gmail calls apps that don't support OAuth2 "less secure".
#ENABLE FMAIL WITH INSECURE APPS PASSWORD#
It would be a good idea not to use that same password for other logins, but that is just good practise and applies to any password for any login. If you have created a good strength password then all will be ok.