Dear Supporting team,
I have installed MailEnable Standard Edition in Windows server 2016. When I use MailEnable webmail few days ago, it shows 503 Service Unavailable. After I restarted the Windows server 2016, it can show MailEnable webmail login interface. Yet, After using two days ago, it shows 503 Service Unavailable again. Then, After I restarted the Windows server 2016, it can show MailEnable webmail login interface again. Could you help me to solve the problem with detail steps? Thank you.