Further to the packet issue above Due to the nature of routing internet Traffic connections Messages especially Email and notification from Forums are given a Lower prioriy than a website hence they arrive via many stops and stored for a second or 2 on several main servers called Hubs

On average my notfications arrive 5 minutes after posting (site time) emails up to a few hours out of sync or they are lost. Though email to somebody on the same email provider are only a second or 2 at most to arrive at the other mailbox