Comment to UNA SMTP mailer blocked by gmail
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Go to this page while logged in to your gmail account:
https://myaccount.google.com/security?pli=1&hl=en&nlr=1
Then "Allow less secure apps"
Go to this page while logged in to your gmail account:
https://myaccount.google.com/security?pli=1&hl=en&nlr=1
Then "Allow less secure apps"