I just discovered this same issue but with a different, though common, mime-type. I changed VoIP providers and while the old one sent voicemail attachments using "audio/x-wav" (which worked fine inline), the new one uses "audio/wav" and it does not play. I added it to the plugin as described above and it now works, but I think it would be prudent to add this and probably even "audio/wave" to the official plugin as these are all apparently common.
Note: I had to view the email message source to see the difference in mime-types. Both Evolution and Jaunty label the actual file after downloading as "audio/x-wav" which made it even more confusing. Jaunty 32bit Evolution 2.26.1 -- no option to play audio attachment https://bugs.launchpad.net/bugs/157281 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs