Using Mandrill for email tracking

No. What does wpMandrill do to track email messages? When you send an email or notification to more than one recipient Email Users constructs an mail header that includes the recipient email addresses in the BCC field.

If you have a BCC limit in place, it will construct a series of emails with a maximum number of recipients in the BCC field based on the setting of the BCC limit option. If you have 2875 recipients with a BCC limit of 500, Email Users will send six (6) messages, the first five will have 500 recipients and the sixth will have 375.

Mandrill gives you a nice interface where you can see all email activity (delivered, rejected, bounced, etc). You can also search by email address. This comes in handy when someone complains that they didn’t receive an email. It makes it super easy to find out what happened.

Thank you for explaining how the email is constructed and BCC limit is used. I disabled the Mandrill plugin and emails were sent fine.

I think I still might play around with the code and see if I can get Mandrill to work with Email Users.

I just discovered that wpMandrill plugin accepts only one BCC address per email. If several are found, only the first one will be used.

If you set your BCC limit to 1 it should work then. The only problem might run into, if you have a large number of recipients, is if your host has a limit on the number of outbound emails.

Yeah, I think that would work but the other issue is that the sender will also receive 1 email for each recipient. So if I send out a mass email to 300 users, I will also receive 300 emails.

Yes, that is true. However, you could use the Sender Override feature to use something a special address that is easily filterable in Gmail (or your favorite email solution).

For example, if my email address is “[email protected]” I could set the sender override address to “[email protected]” and then create a filter in Gmail that would automatically delete anything sent to the oveeride address.

Not super elegant but it would work.

That’s a good suggestion. Here’s another solution I came up with:

Mandrill has a setting where it will split up the TO: field and send individually
https://help.mandrill.com/entries/21751312-Can-I-send-to-more-than-one-recipient-at-a-time-

So I modified the code in Email Users plugin so it puts the bcc variable in the to field:

$bcc[] = sprintf('%s <%s>', $recipient, $recipient) ;
...
@wp_mail($bcc, $subject, $mailtext, $headers) ;

This works! Only problem is I will have to remember this when it comes time to update the Email Users plugin in the future.

Just wanted to say thank you for the amazing and timely support!