Iya ga bs kan servicenya belum jln Mas sesuai error di bawahunable to connect : connection refused
keluar gini om.
Jadi fix errornya itu dulu baru pastikan service eximnya running dgn baik baru bisa,"Failed to restart exim.service: Unit exim.service failed to load: No such file or directory."
Ini pakai centos7 yach ?
coba lihat servicenya ada ga ?
systemctl list-units --type=service | grep at\..*service