I've finished modifying the mass mailer script in response to last week's error. Now, prior to generating the e-mail, the script checks all image references to internal objects within the HTML version of an e-mail. The script performs this check by searching for the following text: src="cid:. If the text is found the script returns an error.
I haven't done extensive testing, though the limited testing I did was successful. I'll know better whether or not this will work as I use the script in the future. For the next few e-mails I'll be double-checking the output to make sure no problems are encountered.
