I'm trying to understand how sending mail to customers under the admin panel work, but could not find much information about it under documentation or in the forum. I would really appreciate it if someone can explain it or point me to previous posts that talk about it.
1) How come "To" is not a required field?
2) When it sends mail to a group of customers, does it mail each customer individually or as a group (i.e. all email addresses in the To: field)?
3) Does it log sent mail anywhere? If I choose to only mail customers that purchased certain products, can I view who these customers are?
4) If a mail is not delivered/returned for any reason, does it log it anywhere?