I have Zimbra mail server (version 806) and I connect to it via Exchange/ActiveSync. Whenever I try to download an attachment the download will finish but when I try to open the file it ends up opening empty txt file "/home/nemo/Do....textplain.txt".
With 18.104.22.168 I am able to forward e-mail attachments. And actually if I do that and choose "Download and send" the download of attachments will work and I am later on able to open the attachments also in the original e-mail.
Could the problem be in the way GetAttachment vs. ItemOperation fetch commands are implemented in Jolla?
EDIT: Just wanted to update that I am still having this problem with 22.214.171.124 and Zimbra 8.5.1. Any ideas how could I help with debugging? Could be also a server problem, but still help would be great how to check that as well.
EDIT2: Still problem with 126.96.36.199. Jolla e-mail is now the only e-mail client that doesn't work with Zimbra, now also Windows Mail is working properly (it didn't work earlier either), so I guess this is not a server side problem.
EDIT 9.3.2017: Attachement still can't be downloaded with 188.8.131.52. The "forwarding"-trick described above is also not working anymore. Any body knows how to debug?