Very slow emails

Very slow emails

Godaddy hosts my emails. I've been using Zoho for 4-5 years with Godaddy (POP3). Just recently the time lag between Godaddy receiving emails and the email getting to my Zoho Inbox has increased from a few minutes to up to 2 hours. Can anyone shed light on this problem? I haven't changed any of my settings and Godaddy tell me they have not changed anything. This makes Zoho unworkable unless this can be resolved.