ntcportal Posted June 8, 2019 Share Posted June 8, 2019 Hello to all I use Microsoft Exchange Server in my organization Unfortunately, when you connect to the whmcs , it does not connect All ports are open I've turned off the firewall Sends the following email after sending 2019-06-08 17:02:27 CLIENT -> SERVER: EHLO *******.com 2019-06-08 17:02:27 CLIENT -> SERVER: AUTH NTLM TlRMTVNTUAABAAAABzIAAAAAAAAgAAAAAAAAACAAAAA= 2019-06-08 17:02:33 SMTP ERROR: AUTH NTLM command failed: 535 5.7.3 Authentication unsuccessful SMTP Error: Could not authenticate. 2019-06-08 17:02:33 CLIENT -> SERVER: QUIT SMTP Error: Could not authenticate. Email Sending Failed - SMTP Error: Could not authenticate. I'm using IMP in the Kayako support system and I have no problem Does it support whmcs of imap? please guide me Thanks 0 Quote Link to comment Share on other sites More sharing options...
ntcportal Posted June 8, 2019 Author Share Posted June 8, 2019 I used Port 993 I received the following Error 2019-06-08 17:25:31 SMTP ERROR: Failed to connect to server: (0) SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting Email Sending Failed - SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting 0 Quote Link to comment Share on other sites More sharing options...
WHMCS Dan Posted June 9, 2019 Share Posted June 9, 2019 Hi, It looks like you are using the IMAP port for the SMTP configuration, you should be able to use Port 465 with SSL to connect to Microsoft Exchange Server and send mail in WHMCS. Can you try this port? If you continue to have problems, please feel free to raise a support ticket and we can investigate further if needed. 0 Quote Link to comment Share on other sites More sharing options...
ntcportal Posted June 10, 2019 Author Share Posted June 10, 2019 Hello I bought the license a few years ago Exit Support Time Licensing has been permanent Please rate this community Thanks 0 Quote Link to comment Share on other sites More sharing options...
ntcportal Posted June 10, 2019 Author Share Posted June 10, 2019 13 hours ago, WHMCS Dan said: Hi, It looks like you are using the IMAP port for the SMTP configuration, you should be able to use Port 465 with SSL to connect to Microsoft Exchange Server and send mail in WHMCS. Can you try this port? If you continue to have problems, please feel free to raise a support ticket and we can investigate further if needed. 2019-06-10 06:10:14 SMTP ERROR: Failed to connect to server: Connection refused (111) SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting Email Sending Failed - SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting Unfortunately, it failed again 0 Quote Link to comment Share on other sites More sharing options...
WHMCS Dan Posted June 16, 2019 Share Posted June 16, 2019 It sounds like the connection may be being blocked by the firewall, have you checked with your provider / server admin to ensure the ports are open and there are no firewall blocks? There are some tips to check on this issue thread with someone experiencing similar issues which may help: https://github.com/PHPMailer/PHPMailer/issues/295 0 Quote Link to comment Share on other sites More sharing options...
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