Using a subject line trigger option
As an alternative to the send as list at the bottom of the compose window in Microsoft Outlook, you can specify your required alias in the subject line of an email message, prefixed by the trigger word: sendas:youralias.
This trigger option can be used when composing an email using Microsoft Outlook, Outlook Web Access, or if you are sending email messages from a mobile device. The trigger can be entered anywhere in the subject line and is removed after the message is processed by Exclaimer Email Alias Manager for Exchange, before it is delivered to the recipient(s).
If you are using Microsoft Outlook and select an alias from the send as list at the bottom of the compose window AND you enter a subject line trigger, the subject line trigger takes precedence and any alias entered here will be used.
Suppose that a user named Karen Green has the default alias of: email@example.com together with the following aliases:
When composing an email to be sent from the firstname.lastname@example.org alias, the following would be entered anywhere in the subject line of the message: sendas:email@example.com, as shown below:
The trigger text is removed after processing, irrespective of whether it is placed before or after the 'real' subject.