I've been using the following to test that html email templates come through formatted correctly in different clients:

curl --ssl-reqd   --url 'smtps://smtp.gmail.com:465'   --user '{EMAIL}@gmail.com:{PASSWORD}'   --mail-from '{EMAIL}@gmail.com'   --mail-rcpt '{EMAIL}@gmail.com'   --upload-file {FILE}

And all of a sudden I'm getting "curl: (67) Login denied" - the login details are definitely correct and nothing's changed on my end. My guess is that google is now blocking non SSO email logins?

CodePudding user response：

Don't know if will solve your problem, but if you have enabled 2-Step Verification in your Google account, you have to create some app password