globaliweb Posted December 18, 2017 Share Posted December 18, 2017 i was using whmcs and using Gsuite, it was working properly with SMTP since few days it stop sending mail via SMTP any one else facing issue. i have not update anything in my server (VPS), not in WHMCS, it is working with mail () $smtp_debug = true; CLIENT -> SERVER: EHLO mydomain.com CLIENT -> SERVER: STARTTLS SMTP Error: Could not connect to SMTP host. CLIENT -> SERVER: QUIT SMTP Error: Could not connect to SMTP host. Email Sending Failed - SMTP Error: Could not connect to SMTP host. Link to comment Share on other sites More sharing options...
24x7cloudservermanagement Posted December 19, 2017 Share Posted December 19, 2017 Follow the below link for more information on how to fix the things. https://docs.whmcs.com/Email_Piping:_Google_Apps Link to comment Share on other sites More sharing options...
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