Frank McCormick<debianlist@videotron.ca>  writes:
Just finished Googling the subject but there doesn't seem to be any
easy way to get mail from Sylpheed into Thunderbird.  Does anyone have
suggestions?
,---- [ http://sylpheed.sraoss.jp/doc/faq/en/sylpheed-faq-1.html#d0e177 ]
| Mails are stored in the MH mailfile format as used by MH and EMH.
`----
,---- [ http://kb.mozillazine.org/Importing_and_exporting_your_mail ]
| Thunderbird, Netscape, Mozilla Suite and SeaMonkey use mbox files to
| store the messages for a folder.
`----
,---- [ http://oclug.on.ca/archives/oclug/2005-October/047793.html ]
| Thanks for the tip Dave.  As it turned out, Sylpheed itself now has a
| built-in 'export' feature that will convert the default MH format to
| traditional Mbox e.g.  File>  Export...
`----
See also man formail.