change sender address when sending mail through gmail in c#

Question

I have used the following code to send mail from my web application using a gmail account. My question is, can i change the sender address to another address other than original sender(gmail) address? My code is as follows:

System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
System.Net.NetworkCredential cred = new System.Net.NetworkCredential("[email protected]", "*******");

Whatever i do is useless as i always receive mail from [email protected]. Is it possible to change it?

I have changed to mail.From = new System.Net.Mail.MailAddress("[email protected]"); but i received the mail with the from address [email protected] and not from the new "From" address. I think gmail smtp overwrites the from address with the original credential.

Masseur

Answer 1

Gmail doesn't allow you to change the FROM to something different than your gmail account.

It doesn't matter what you use, they over-write it, before they relay it on. This prevent spamming/spoofing.

Irrepealable

Not true, see my comment below. It is possible, as long as you have the other account added as an alias. – Stclair

This is not the correct answer, I implemented philip and Simon_Weaver's answers together today and was able to successfully send email from a G Suite alias using the account's main login details (which are different from the alias). – Alsacelorraine

Answer 2

This is the solution:

1. use the codes above to set mail.From = new MailAddress(address, display name)
2. in Gmail, go to Mail Settings >> Accounts and Import.
3. Add the email account you will use as sender in "Send Mail As". (tick as Alias)

This works for me

Lowney

Much better answer. It is possible to change the From in Gmail. – Columbium

Perfect. Thanks a lot! – Daylong

This is a much better answer. Thanks. – Chrysoberyl

Answer 3

Yes just use the From property of the MailMessage

eg.

mail.From = "[email protected]";

EDIT: Also, see this post for more detailed info on how to emails via gmail in C#

Sending email in .NET through Gmail

EDIT: Although this works for mail in general, it appears this won't work for gmail as google overwrite it before its sent (see @Dave wanta's answer)

Needleful

While you're right in general, when specifically sending mail through Google SMTP servers the "From:" property is overwritten. – Matchwood

This is not true, you CAN use a different from address using Google SMTP. Just make sure it is an alias (as w69rdy points out) and that you follow the RFC 2822 specification (my mistake was having a space between the email and name brackets, it should be [email protected]<Test User>). The sender address will NOT be changed by Google, but you can influence this because it will use the account marked as default in your gmail settings. – Stclair

Answer 4

If you have a limited number of senders you can do as @philip suggested. For instance you may have [email protected], [email protected] and [email protected] or even [email protected]. As long as they are approved senders on the actual gmail.com website you can send from them.

Gmail.com : Sending mail from a different address

If you are expecting to send from an arbitrary user (such as a customer service form on a website where the user enters their email and you don't want them emailing you directly) about the best you can do is this :

        msg.ReplyToList.Add(new System.Net.Mail.MailAddress(email, friendlyName));

If you're in a controlled environment this works great, but please note that I've seen some email clients send to the from address even when reply-to is specified (I don't know which).

Lallation

Answer 5

Check #56 and #58. They might be relevant to what you want to do https://code.google.com/p/google-apps-script-issues/issues/detail?id=172

Submerged