Question : How to check outgoing messages

I have several customers that have indicated they have not received specific emails that I have sent them. It appears that it only effects mail that I send that have attachments (usually pdf documents). It is not all emails that are effected as some documents do get delivered.

I find any time I sneeze near my server I manage to break something so I thought it best to ask rather than poke around myself.

Would someone be so kind as to explain for me

1. How I can check if the emails I am sending from my workstation are actually being sent out by exchange server to the recipient

2. Where I can view any settings that may effect whether these emails are being blocked by some kind of rule.

3. How can I check if any incoming emails are being trashed when being received

Thanks in advance

Regards

David
The workstations are all Windows XP sp3
Server is SBS 2003
Exchange Server is 2003
Also Runnign ISA

Answer : How to check outgoing messages

Number 1: If you go to System Manager > Tools > Message Tracking Center you can track message inbound/outbound by adding the necessary info. In your case, the server, and either the sender (your) email address or the Recipients (their) email address. Then click the FIND button.

Number 2: I would look at System manager > Servers > YOUR SERVER NAME > protocols > SMTP > Default SMTP Server. The Access Tab and Delivery tab contain most of the info you need to look at. I would also double check that you are not on any blacklists (just google the term).

Number 3: Same as Number 1