Unable to send an email to multiple addresses/recipients using C#

Question

I am using the below code, and it only sends one email - I have to send the email to multiple addresses.

For getting more than one email I use:

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Answer 1

The problem is that you are supplying a list of addresses separated by semi-colons to the MailMessage constructor when it only takes a string representing a single address:

A String that contains the address of the recipient of the e-mail message.

or possibly a list separated by commas (see below).

Source

To specify multiple addresses you need to use the To property which is a MailAddressCollection, though the examples on these pages don't show it very clearly:

message.To.Add("one@example.com, two@example.com"));

The e-mail addresses to add to the MailAddressCollection. Multiple e-mail addresses must be separated with a comma character (",").

MSDN page

so creating the MailMessage with a comma separated list should work.