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- Fri Feb 23, 2018 12:23 pm
- Forum: General Zimbra Feedback
- Topic: Zimbra Open Source vs Zimbra Suite Plus
- Replies: 3
- Views: 4434
I can not send mail from Zimbra to Gmail. But I can send mail Zimbra to all other mail. The problem Zimbra showed to me is: "The IP you're using to send mail is not authorized to 550-5.7.1 send email directly to our servers. Please use the SMTP relay at your 550-5.7.1 service provider instead.&...