Weird garbage characters showing up after sending email

While sending a newsletter, garbage characters started showing up as the newsletters were being sent out.

See attached. Any clues?

Your image just looks like a grey smudge - can't see a thing...

doesn't matter if it looks like grey smudge. All they are are a bunch of random characters.

That symptom reminds me of an old mailing list I belonged to. The only acceptable format was no format. Straight text, no bold, no italics, no underline - and above all else - no attachments or images. Occasionally someone would cut/paste from a word document and all the hidden formatting would result in a 30 page email with nothing but junk like that because it just made the listserver vomit bytes.
Is your email configured for html/text? I found this on the wiki:
http://www.zen-cart.com/wiki/index.php/Admin_-_Tools_-_Newsletter_Manager

joejoejoe:

That symptom reminds me of an old mailing list I belonged to. The only acceptable format was no format. Straight text, no bold, no italics, no underline - and above all else - no attachments or images. Occasionally someone would cut/paste from a word document and all the hidden formatting would result in a 30 page email with nothing but junk like that because it just made the listserver vomit bytes.
Is your email configured for html/text? I found this on the wiki:
http://www.zen-cart.com/wiki/index.php/Admin_-_Tools_-_Newsletter_Manager
No, it's a result of Gzip compression confusing things in output.

Either turn off the GZip setting in your Admin->Configuration->GZip/Compression option, or turn it off in your hosting account.

DrByte:

No, it's a result of Gzip compression confusing things in output.

Either turn off the GZip setting in your Admin->Configuration->GZip/Compression option, or turn it off in your hosting account.

That worked. Thanks.