error messages Ox800CCCOF 0x8004210B

S

Sandy

I should be very grateful if anyone can throw light on this problem. My
messages sent using Outlook 2003 seem to be being delivered OK from outlook
and test setting all come up positive but I keep getting the infuriating
messages - Sending' reported error (0x8004210B) : 'The operation timed out
waiting for a response from the sending (SMTP) server. If you continue to
receive this message, contact your server administrator or Internet service
provider (ISP). The server responded: 553 From: address not verified;
or sometimes the reference is Ox800CCCOF

Any idea how I can fix or get rid of this. Detect and repair and other
discussion threads shown under Ox800CCCOF have all been tried but do not work
Thanks
 

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