Hello ^^. According to that chart it should be released in Patch 1.20, however, according to the "FFXIV Updates, Version 2.0, and Beyond" chart under the category "Communication" it states, "Release of a delivery system and mail system for version 2.0." So we'll see in time which one is correct or maybe even both, haha. Hope this helps.

FFXIV 2.0 Roadmap
FFXIV Updated, Version 2.0, and Beyond