Hello community,
I like to use osTicket with SendGrid SMTP. Under Admin Panel -> Emails, I enabled Sending Email via SMTP, I filled Email Login Information and all other fields. But when clicking on "SAVE" an I get an error: "authentication failure [SMTP: Invalid response code received from server (code: 535, response: Incorrect authentication data)]"
Meanwhile, I have checked the login and password more than three times. There are definitely correct. Now, I heard that osTicket is not compatible with SendGrid. Is that true? Is there any workaround?