Unable to receive mail with large attachments Windows 2012 Live Mail

Someone tried to send to me large .pdf attachments.  I did not receive any notice that the email was rejected. The email just never appeared.  I checked with my website hosting service and they indicated there was no size limit that would affect my receipt when I told them the size.  I finally received the email with attachments reduced into several emails w/ attachment.  Later I tried to forward emails & attachments to another party and the email would go to my Outbox but NEVER get sent.  What is going on with my 2012 Live Mail software?  Is there an upgrade?  I rarely have had any problems with Windows Live Mail software.