Sender's Time Zone for Outlook

Sender's Time Zone for Outlook screenshots

See the timestamp of the sender's time-zone when you read an Outlook e-mail

Alternative downloads

Time Zone Data Update Tool for Microsoft Office Outlook
This tool adjusts Microsoft Office Outlook calendar items.
PowerShell Outlook Add-In
It provides any easy way to deal with repetitive email tasks.
Sperry Software - Reply To All Monitor and Sent Items Organizer for Salans
Saves time by not including your name and email in a reply to all message.