Small home SBS2003 network running MS Exchange 2003
Server has two network cards. One connected to Billion ADSL router connected to the Internet. THe other connected to a internal Belkin Router where my wife and I are connected to.
For 7 days straight now my wife (on a XP notebook) and I (on a Vista Desktop) are no longer able to successfully send outbound emails. All inbound emails are being received ok. Everything has been working perfectly for over 3 years and suddenly this problem has appeared. No changes have been made except for regular patches (on the server and Clients) through Microsoft update service.
Symptoms are as follows:
When either of us send emails out to ANY address (multiple different domains) they all come back with a Delivery Status Notification (Delay) error email from exchange. The next day we get another delay message and then finally a Undeliverable message with the reason of "Could not deliver the message in the time limit specified".
I did a search buit most people have this problem from time to time with a few different emails. My problem is different because it is happening with ALL outbound emails including ones we have regularly used previously. Only my wife and I have accounts on the SBS2003/Exchange box and the problem is affecting us both exactely the same.
I called our ISP thinking it may be something wrong with their SMTP server. As soon as I mentioned that I had an exchange server they would not help me (Typical). Anyway he did ask if I could access and send from my webmail account with them. I have indeed tested this and it works fine. He claimed that there was nothing wrong with their SMTP server then and it must be exchange related.
I'm IT savvy (enough to have put the network together in the first place etc) however I have minimal SBS2003 and exchange experience. Any solutions should assume technical knowledge but require directions! I have already checked to make sure the outbound SMTP configuration in exchange hasn't changed and is still pointing to the ISP which it is.
Now there was a power outage around the date that this started happening however I can't be 100% certain that it was actually the day the problem started. It may have be coincidental (So don't jump to any assumptions) , but I thought I'd mention it just in case this could be caused by isolated corruption.
All other services, connection through the internet etc is working perfectly. All incoming mails are received and the outlook clients are working fine with all mailboxes being read fine etc. Just no more sending out...?