I have been using email campaigns since they were added to Sugar. They broke for me with 4.0 but were fixed again with a later patch. They broke again with 4.2 and only worked when I discovered if I made a new campaign it would send mail. However, now I am on 4.2.0d and ready to send my forth transmission on the new campaign and it will not send. My last transmission on this campaign was 05/20/2006 and I was using either 4.2.0a or later at that time. Again, the only way to get things going is to make a brand new campaign and configure it as the old one and then everything is rosy.

It doesn't take that long to make a new campaign, but I don't have all the historical data if they are all related, but each transmission is in a different now dormant campaign.

Mac OS X Server 10.4.6
Sugar Suite 4.2.0d
Apache 1.3.33
PHP 5.1.4
MySQL 5.0.16