Rob L wrote:
The ones I quoted are much more prone to hacking and other malware (perhaps not relevant to this thread though). I'm not an expert, so it's just my observation.
This isn’t about hacking though. I suspect that the email address that everybody got in their subscription letter is either a dummy one, or a test email address (perhaps the email address of the person managing the mailing) put in by the mailing house, which never got replaced with a MailMerge field.
Either way, it’s nothing more than an erroneous piece of information and does not, I think, represent any form of hacking.