Zimbra using SocketLabs as external SMTP
由於家用ISP會Block 25 port而無發外寄郵件, 所以改用外部SMTP, 一個月2000封對於本人已經很足夠 https://cp.socketlabs.com/ 一定要先Add sending domain, 沒有驗證的domain寄不出的 其實只需要Verify via ...
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Ubuntu 18.04 Zimbra behind NAT
Can't receive self domain email behind NAT status=deferred (delivery temporarily suspended: connect to mail.mydomain.com[202.xx.xx.xx]:7025: Connectio...