How can i set the "delivery server", there is no option for me to select.

[david_yue]

where can i find Mailwizz technical support or service telephone except to post a question here, it's so inefficient.

 

[david_yue]

is there anybody who can help me out ?

 

[twisted1919]

@david_yue - i have answered your support ticket.
You're in customer area. You have to be in backend area. Here's the link https://kb.mailwizz.com/articles/understanding-the-application-structure/