From property

This property contains the sender email address and, optionally, name. If you specify the sender name in addition to email address, you should put email address into <> signs.
This property should be specified before sending email message.

Example

This example shows the possible ways to set sender email address and name.

mail.From = "john@email.address.com"
' or
mail.From = "John Smit <john@email.address.com>"