>Hi all.
>
>A program of mine has used CDO to successfully send e-mail and it has been working for several years. Now, all of a sudden, for no apparent reason, when it ties to send e-mail, it is getting this error back:
>
>the server rejected the sender address. the server response was 550 access denied invalid helo name
>
>I have googled this to no avail and I am ready to pull my hair out. Any ideas? The strange this is that e-mail is being successfully sent via Outlook Express so that is configured properly and it has always been the case that if OE was confiured properly, CDO would be too.
>
>BTW, the application is running on Terminal Server.
>
>TIA
I don't know if this applies to your case but I have had the following issue. Many companies now have their exchange server or SMTP blocking emailing initiated on the client. They only allow emails to be initiated on the server. I have had several customers started having problems with my application emailing to SMTP from client PCs where it was never an issue before. HTH.
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