Sorry for the trouble, a month ago I created a thread about user cannot receive email issue, after that I changed osTicket Outgoing Email default MTA from "Use PHP mail function" to my default system email(ithelpdesk@mydomain.com):
Yesterday, the same issue happened again, the user created a ticket, the user received ticket created email which send from ithelpdesk@mydomain.com, the agent reply the email and CC the email to agent himself, the issue is agent received the reply email by himself but agent not received email, I checked the email trace log and found the email send log to agent at that time but nothing log about the user.
So I'd like to know how can I check in osTicket system whether the system start email send action when agent reply the ticket? Because I didn't find email send log from ithelpdesk@mydomain.com at that time, I think maybe the osTicket not trigger email send action or somehow.
Please advise, thank you so much.