I think your best bet is to find out if that function allows setting OpenSSL options. I had to call into Post Box to explain the fingerprinting process so I could inform our team. In practice, the SSL_OP_IGNORE_UNEXPECTED_EOF option needs to be set via the OpenSSL API, but quite likely you are using some higher level function to operate the HTTPS connection (like curl). But what makes Postbox really useful is the way it lets you find and reuse all kinds of content hidden deep within your email. When this option is enabled the peer does not need to send the close_notify alert and a closed connection will be treated as if the close_notify alert was received. Postbox lets you spend less time managing messages and more time getting things done. If the application tries to wait for the close_notify alert but the peer closes the connection without sending it, an error is generated. Download here Released on 4th December 2011 Postbox lets you spend less time managing messages and more time getting things done. Some TLS implementations do not send the mandatory close_notify alert on shutdown. OpenSSL manual describes the options flags that permits connection despite the vulnerability: I guess you are trying to download a file from a outdated server to which OpenSSL 3.0.2 does not permit connection by default. Postbox 3.0.2 Cambio de registro - Added a new trouble shooting panel under Help Trouble Shooting. Ubuntu 22.04 upgraded OpenSSL to version 3.0.2, which is more strict in its security policies. Postbox 3.0.2 Girii deitir - Added a new trouble shooting panel under Help Trouble Shooting.
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