I am sending out some newsletters, but am getting bounce backs with the following error:
Your message was rejected by <isp.name.here> for the following reason:
mail server permanently rejected message (#5.3.0)
I can send via my normal email application to these same people without problem, but anything i send to them via MBM bounces back with this error.
The message also says "This type of error is usually due to a mis-configured account or mail delivery system on the destination computer; however, it could be caused by your message since some mail systems refuse messages with invalid header information, or if they are too large."
Does anyone know what this might be? I've tried adding the same X-Mailer header as my email app, but this didn't help. File size shouldn't be the issue, so i don't know what to try..
I really need to sort it out as the people affected are my main clients...
thanks
Your message was rejected by <isp.name.here> for the following reason:
mail server permanently rejected message (#5.3.0)
I can send via my normal email application to these same people without problem, but anything i send to them via MBM bounces back with this error.
The message also says "This type of error is usually due to a mis-configured account or mail delivery system on the destination computer; however, it could be caused by your message since some mail systems refuse messages with invalid header information, or if they are too large."
Does anyone know what this might be? I've tried adding the same X-Mailer header as my email app, but this didn't help. File size shouldn't be the issue, so i don't know what to try..
I really need to sort it out as the people affected are my main clients...
thanks