Zimbra working just fine on Outlook but now...

[sporkbooking]

This might have been asked before, and as a warning, I am not either zimbra or computer literate, so here goes:

My zimbra was working just fine on both my iphone 6 and ipad mini using outlook, but now it won't send outgoing messages. I am still receiving and seeing emails just fine. I get this response from my devices whenever I try to send emails using either:

Cannot Verify Server Identity
The identity of (server address)
cannot be verified by Mail.

Thank you!

[jorgedlcruz]

Hello,
Which Zimbra version do you have?