How to send bulk emails and newsletters safely

Just a reminder that when sending an email to a large number of
recipients it is best to use Mailchimp or Constant Contact or some
similar marketing email software. The reason is that we have email
limits set on our email server by our ISP's (Internet SErvice Providers).
 If we don't respect these limits our emails will not be
received and we could get put on a blacklist (and recognized as
spammers).  Mailchimp and other email marketing software is setup to
especially deal with these limits and also removes the errors which can
be involved with sending such large and numerous emails with Outlook or
any other email client running on your desktop.  So, in so many words,
please use mailchimp or the like when sending to large numbers of