ASP.Net 1.1, 2.0 and 4.0 cannot send emails. But when I use classic ASP

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Asked: May 30, 20262026-05-30T07:11:55+00:00 2026-05-30T07:11:55+00:00

ASP.Net 1.1, 2.0 and 4.0 cannot send emails. But when I use classic ASP it can send emails.
Telnet can also send emails.

Windows Server Standard (2007)

I receive this error:

The message could not be sent to the SMTP server. The transport error code was 0x800ccc14. The server response was not available

I know this is a winsock issue and this issue happens once in a while and we perform a reboot and everything is okay.

What I want to know is what causes this and can I prevent this or stop rebooting every single time?

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Editorial Team · Answer 1 · 2026-05-30T07:11:56+00:00

Editorial Team

After a few weeks of debugging and fix finding the only workaround for this would be to either reboot the server or move to using System.Net.Mail.

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