May 31, 2022

Failed to read beginning of SSL/TLS record – can be caused by External Firewall

If the problem is with Office365, such as with SendEmail to smtp.office365.com, port 587, then updating to Chilkat v9.5.0.93 or later will solve the problem. For example, if you see the following, then update to v9.5.0.93 or later. … ensureSmtpSession: ensureSmtpConnection: smtpParams: SmtpHost: smtp.office365.com SmtpPort: 587 SmtpUsername: … SmtpSsl: 0 StartTLS: 1 –smtpParams smtpConnect: smtpHostname: smtp.office365.com smtpPort: 587 connectionIsReady: SMTP […]

Errors 0 1 min read
July 3, 2016

Damn You Windows Firewall!

One particular cause of the following error is finally known: sockRecv(47ms): WindowsError: An existing connection was forcibly closed by the remote host. WindowsErrorCode: 0x2746 numBytesRequested: 5 Failed to receive data on the TCP socket –sockRecv sockRecv failed. sockRecvN_buf: Did not receive the exact number of bytes desired. numBytesToReceive: 5 This error was caused by the Windows Firewall doing stateful FTP […]

Uncategorized 0 1 min read

Tags

ActiveX asp async asynchronous C# callbacks charset Delphi email Encryption error messages events exchange server FTP GMail HTTP IMAP IOS Java Linking MHT MIME oauth2 Office365 pfx PHP pop3 port-forwarding regsvr32 release notes RSA SFTP SMTP socket SSH SSL TLS tunnel upload vb6 VC++ x64 xades XML zip