Many, many of my users who host on Bluehost/Hostmonster are seeing this error in their error logs, when attempting to send mail using my program (Dada Mail) via sendmail:
I'd like to know what, 451 Temporary local problem - please try later means. If it's purely a mail server problem, I'd like to be able to code Dada Mail in a way that can react to a mail server problem - basically by backing off attempting to send mail.
didn't close pipe to '|/usr/sbin/sendmail because:
451 Temporary local problem - please try later
If this is different problem, I'd also like to know. One problem that comes to mind is when a user goes over their hourly email sending quota - this doesn't appear to be the error that you'll get if you go over such a quota - or is it?
It's really hard to figure this all out, especially the latter, as there's no way that I know to programmaticly find what that hourly email quota is. I've heard it's anywhere from 50 to 750 messages/hour.
can anyone shed any light?