I've same issue with my ftp development.
I'm copying the files to ftp server and its working fine with other 2-3 ftp server.
But at one ftp server its giving error saying "Remote Server returned an error: (530) Not logged in."
Even I'm able to connect that ftp server with ftp.exe and ftp software and able to copy/delete files mannually.
Please suggest me the solution and I'll very thankful.
I'm using the following code.
FileInfo fileInf = new FileInfo(filename);
string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
// Create FtpWebRequest object from the Uri provided
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));
// Provide the WebPermission Credintials
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPasswo
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