This article was previously published under Q296161
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This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
When you attempt to send a message through a Mindspring Simple Mail Transfer Protocol (SMTP) server, you may receive the following error message:
The message could not be sent because it rejected you as the sender. Server response '550', Access Denied 0x800CCC78
This behavior can occur because the Mindspring SMTP server is not available for outgoing messages. Mindspring no longer allows use of their SMTP server to send messages unless you are connected through a dial-up.
To resolve this behavior, point outgoing messages to a different SMTP server:
On the Tools menu, click Accounts.
On the Mail tab, click Add, and then click Mail.
When the Internet Connection Wizard appears, follow the prompts and type the required information, depending on the selected account type.
You can also modify the properties for the existing Mindspring account. On the Servers tab, replace the Mindspring SMTP server with another SMTP server.
The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
For information about how to contact Earthlink, Inc., click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:
65416 Hardware and Software Third-Party Vendor Contact List, A-K
60781 Hardware and Software Third-Party Vendor Contact List, L-P
60782 Hardware and Software Third-Party Vendor Contact List, Q-Z