C>S 0x5B SID_CHANGEEMAIL

Message Id:	0x5B
Message Name:	SID_CHANGEEMAIL
Direction:	Client to Server
Used By:	Starcraft Original, Starcraft Broodwar Diablo II, Diablo II Lord of Destruction Warcraft III Reign of Chaos, Warcraft III The Frozen Throne
Format:	`(STRING) Account Name (STRING) Old Email Address (STRING) New Email Address`

Remarks

Requests Battle.net to change the email address bound to an account. This packet must be sent before logon.

This packet used to be named SID_AUTH_DISCONNECT, however Blizzard never had it implemented, and so reused the packet ID for their email system.