[how do i keep my IMs from being capped?]

when i log in i dont check my emil very often i would like to know if there is a way for me to log in and see all the IMs i got while offline. so my question is ( Is there any way for me to have my offline IM's not caped?)

[i have singularity viewer but i cant find the market place where is it?]

i just downloaded singularity viewer but i cant seem to find the marketplace can some one help me.