When authenticating receive 403 disallowed_useragent

Chris Aylott
Chris Aylott

This is a security setting that is applied on the GMAIL account level, you will need to engage the mail administrator. 

There appear to be two solutions:

  1. Use webview to change theUserAgent - i.e. the browser
  2. Have the GSuite mail administrator allow those UserAgents

Please see https://stackoverflow.com/questions/65353812/web-google-auth-workaround-for-403-disallowed-useragent-exists  more information. 


This is not something Nylas support can assist you with.

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