I have a buyer. he want to give me more documents by mail… can I give him my email address?
No - any files needed can be sent by Fiverr messaging.
Email communication outside Fiverr is not allowed.
In addition to what @offlinehelpers said, if sending all the files through Fiverr isn’t possible for any reason (large files, Fiverr being buggy at the moment), it’s allowed to use DropBox or similar service, but only with all the personal information removed. Your buyer can upload the files to DropBox and send you the link.
actually that happen. The file is too large.