Email troubles, could one of you tech guys explain?

[Lucky_Martin]

For a few weeks now we had emails not arriving at the receiving end and also we were not receiving emails that we should have been getting.
The weirdest is that even some orders did not come through, although we have the confirming email sent to our isp-emailaddress as well and they did arrive there normally.

Now I heard from a few other people as well that they have the same problems, so it's obviously not just our host.
What is going on that this problem occurs and why would a certain email sent to 2 different addresses arrive at the one but not at the other?

[Extreme John]

LM, check with your host in regards to what filters, etc, they put in place to handle the SoBig F Virus, many ISP's got the same info and many are using the same techniques, this may very well be the issue.