That's true. That is a reason I do not allow sending out mass emails from the main mail servers IP address. You never know who will be trigger happy. If for so

That's true. That is a reason I do not allow sending out mass emails from the main mail servers IP address. You never know who will be trigger happy. If for some reason bulk mailing providers do not suit you it cheaper to have a separate machine/IP address for sending such emails than having to deal with important emails not coming through because somebody blacklisted your IP address although he subscribed to the mailing list.