[sylpheed:36695] problem with Sylheed while trying to move mail

[Mertens Maatwerk]

This was the error I saw in the log after trying to move a message from the inbox to another mail map

** Sylpheed-WARNING: Couldn't execute curl
** Sylpheed-WARNING: g_spawn_async_with_pipes: Failed to execute child process "curl" (No such file or directory)

Moving things seems problematic some time longer.

But it isn't always a problem ...