You might want to start by isolating this problem to determine whether it’s truly a network problem; or whether it’s specific to PHP mailer or your code. On your server, from a command prompt, try using telnet to connect to smtp.gmail.com on port 587, like so: telnet smtp.gmail.com 587 You should see a response from … Read more
Get to your Gmail account’s security settings and set permissions for “Less secure apps” to Enabled. Worked for me.
Method 1 (Preferred) – Using hMailServer After installation, you need the following configuration to properly send mail from wampserver: 1) When you first open hMailServer Administrator, you need to add a new domain. 2) Click on the “Add Domain …” button at the Welcome page. 3) Under the domain text field, enter your computer’s IP, … Read more
I know this is an older issue, but I recently had the same problem and was having issues resolving it, despite attempting the DisplayUnlockCaptcha fix. This is how I got it alive. Head over to Account Security Settings (https://www.google.com/settings/security/lesssecureapps) and enable “Access for less secure apps”, this allows you to use the google smtp for … Read more