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Gmail SMTP Error Could Not Connect To SMTP Host

If you receive any Gmail SMTP error could not connect to SMTP Host try the below-mentioned troubleshooting methods.

Solution: 1

  • Using the Antivirus software for real-time protection and enabling the web-based protection to prevent phishing emails causes the SMTP host failure.
  • Due to this, you will not be able to send any messages using the SMTP host.
  • If you are using Avast Antivirus, open the application and click the Settings tab at the left side panel.
  • Select Components and click the Customize option under the Mail Shield tab if the SMTP error could not connect to SMTP Host.
  • Under Mail Settings, uncheck the Scan outbound mail(SMTP) checkbox and click the OK button.
  • Close the Avast Antivirus application and try connecting to your SMTP host.

Solution: 2

  • On your web browser, navigate to the Gmail sign-in page.
  • Enter your email address and password to log on to your Gmail account.
  • Navigate to the Account Security window and click Sign-in & security.
  • Scroll down the page and toggle on the “Allow less secure apps: ON” button.
  • Now, log out from your account and close the Gmail window.
  • Check the php.ini file for the SMTP server settings.
  • If you have entered the SMTP settings incorrectly, the SMTP host will not connect to the Gmail SMTP server. 
  • Try sending an email and check if the error appears again.
  • If the problem persists, contact our technical experts by clicking the Call button available on this screen for remote assistance to fix the issue of SMTP error could not connect to SMTP Host.