I've also recently setup Yam 2.7 on OS 3.1, works like a charm with Gmail with Amissl installed using pop 3.
On a similiar topic does anyone know how to turn off graphics in Yam? I currently don't have the GIF and JPEG datatypes installed so I get about 50 error messages when opening YAM complaining that it can't load the GUI images, however I can still use YAM without these images. I could ofcourse just download the datatypes but I'd rather just turn off graphics all together to avoid system slow down. I've checked the standard YAM options and looked at the config text file. Does anyone know if turning off graphics is possible?