Sending "on behalf of" emails

Question

I have been received a lot of emails "on behalf on". For example, the AddThis plugin sending a email from "addThis.com on behalf of [email protected]".

How do I do this in C#/ASP.NET? Also, does this work if we use gmail for our SMTP, albeit branded to our company domain?

I'm also wondering if there are any concerns about this being unprofessional or getting flagged as spam on the client PC? In other words, have you guys actually implemented this...

Answer 1

You have three properties in the MailMessage class:

• From
• Sender
• ReplyTo (or in .NET 4 the ReplyToList)

If you set the Sender different than the From, it should behave as you want it.

Please also see this SO posting for other aspects.