Funny, In my case YAM was the only program that worked for me..... though you could try different versions as well, on my sys. v. 2.4 works best.
I'd also check to see if you need secure authentication (as MobbyG mentioned) , I have heard that more and more ISP's do.... Mine, Earthlink, has required authentication for years....
Be patient, I found it tricky to set up E_Mail on my miggy, but at least there's lots of ppl. here to help :afro: