Created attachment 35203 [details] screenshot of where I entered the e-mail address When using an e-mail address with a + in it, this is not sent correctly, resulting in a failing login. The emailaddress used looks like myname+jmeter@gmail.com. This somehow doesn't get sent correctly. When using e-mailaddresses without the +, the test works just fine.
Did you tried and failed with enabling "Encode?" checkbox?
Did ticking the Encode box fix the issue or is it still present?
Closed, as no feedback was given and it is most likely a problem of wrong usage.
This issue has been migrated to GitHub: https://github.com/apache/jmeter/issues/4461