一、防火牆設定
webmail可收發信，outlook無法收發信，解除阻斷ip
選擇防火牆設定→自動防禦阻斷→已阻斷中記錄→把全部阻斷ip全解除
二、信寄出去，完全被退信
This is the mail system at host airfly.com.tw.
I’m sorry to have to inform you that your message could not
be delivered to one or more recipients. It’s attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<80033175@mail.tycg.gov.tw>: host mail-sv.tycg.gov.tw[163.29.253.170] said: 552
Sorry, your host is blocked by spam detection system. (in reply to DATA
command)這網站，可以查出為何被阻擋https://mxtoolbox.com/SuperTool.aspxspamhaus.org 這個可以解除封鎖UCEPROTECTL2這個要付費，不付費要等7天，就會解除