To solve this issue it is necessary to enable SMTP authentication in your email client (in Outlook check "My server requires authentication" at the email account properties).
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"451 Please try again later" when sending emails from Outlook
When you try to send emails from Outlook, you receive the following message: An unknown error...
"Error 0x800CCC78" when sending emails
When you try to send emails, the following message will be returned to you: Sending' reported...
"Error 0x800ccc0d or 0x800ccc0f" when sending or receiving emails
When trying to send/receive emails you receive one of the following messages: The server could...
"Message Could Not Be Retrieved" or "Server Error: 0x800CCC90, Error Number: 0x800420CD"
This problem originates from the inability of Outlook to download a particular email from the...
"too many attachments" when sending an email
In the shared hosting environment, the maximum number of attachments that can be sent in an email...
