Gmail Error The SMTP server requires a secure connection or the client was not authenticated

The SMTP server requires a secure connection or the client was not authenticated

Got this  errors  means that Gmail has blocked your application . but username and password is correct you will do below like this 


Go to below link

https://www.google.com/settings/security/lesssecureapps


Turn on - the less secure apps


Access for less secure apps







3 comments:

  1. If you have to resolve Gmail queued then, go to Settings option and then, choose Accounts. Now, choose Google Account and select the Email Account. Now, uncheck Gmail and restart your phone. When restart, again enable the checkbox and check if the issue fixed. If not, then call on +44-800-368-9067 to get in touch with the technical experts for instant and reliable assistance.
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  2. If your Gmail is missing emails that you know are in there then, the most likely cause is that you deleted or archived accidentally them. You can check this easily enough by clicking on the Trash folder in Gmail. Most often you can get the trash folder by clicking on “More” in the folders area, then click on “Trash”. If the email is in there, then it might be archived. In the area where you clicked “More” look for “All Mail”. Now, you will see your all mail, whether archived or not. Call Gmail Support UK to get connected with the experts for instant help.
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  3. Gmail is the best email service and it comes with excellent features to enhance the experience of the users. To check Gmail sync settings, you will need to open the Gmail app and on the left, tap on Menu and Settings. Now, tap on your Account and make sure the box appears next to “Sync Gmail” is checked. Call on Gmail UK to get in touch with the technical experts for instant and reliable support. The teams are always there to help you in any manner they can.
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