其他ISP 的SMTP 伺服器
| ISP | SMTP Server |
| Pacnet (Pacific Internet) | smtp.pacific.net.hk |
| HKNet | smtp.hknet.com |
| Hong Kong Broadband 香港寬頻 |
smtpo.hkbn.net |
| HGC broadband (Business users): 和記寬頻 (商業用戶) |
mail.on-nets.com |
| HGC broadband (Home users): 和記寬頻 (住宅用戶) |
smtp.hutchcity.com |
| i-cable 有線寬頻 |
smtp.i-cable.com |
| PCCW Netvigator (Business and home users): 電訊盈科網上行 (商業及住宅用戶) |
smtp.netvigator.com |
