Welcome, if you would like to post a comment please register.
We also encourage you to explore all things Zimbra with our team and members of the community.
When composing a new message in zimbra mobile, adding attachments is not supported. I'm not sure if it is supported in newer versions. So is this feature implemented in newer versions? If yes, what version? If no, is it going to be supported soon?
Bugzilla
Wiki
Source
Adding attachments 
Linear Mode
