I must apologise first as I posted this question in the Windows Server forum and reallised that it is probably an Exchange issue if anything - sorry administrator.
I have an exchange 2003 server SP1 running on 2003 server domain controller (SP applied and removed as it stopped the exchange server sending internally or receiving) - i know not best pratice!
I have noticed that whenever the server is rebooted incoming email was lost in the system.
This was resolved by restarting the SMTP virtual server in ESM when new email would be received and delivered correctly.
However any email received by the exchange server before the SMTP server was restarted would be lost with no NDR report.
So as it seemed to be an issue specific to the SMTP server i decided to reinstall it through Add/remove Programs, Windows Components, Application Server, IIS, SMTP Service.
The SMTP Server is now showing in ESM however now it is not possible to send email internally, externally or to receive email - although i can telnet email in.
Also the POP and NNTP servers do not start in ESM either.
I have reapplied Exchange Service Pack1 with no improvement and am beginning to face the prospect of reinstalling Exchange.
Any help with this would be gratefully received.
(max points available as this is urgent!)