> This version of sylpheed appears to phone home to some server, and
> performs a version check.
> 
> Doing the version check alone leaks information about the user (at a
> minimum, that they are running Sylpheed, and their IP address).  This is
> a security problem.

FYI: During update check process, sylpheed access to 
http://sylpheed.sraoss.jp/version.txt
and provides the following information only.

* os (win or linux or other)
* version

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