I'm going to suspect that WPS doesn't do the multi-part headers quite right when trying to attach the pdf to a K-9 message. You could look at the raw version of messages where you attach using WPS vs. FileExplorer vs the "sent" mail. My bet, given that "sent" is ok, is that there's a problem with the "Content-Transfer-Encoding" part with WPS as that matters when the message goes out through a mail server while not as much for on-device "sent" mail.
> Date: Saturday, August 29, 2015 10:47:46 -0700 > From: Junnan Zhang <[email protected]> > > I'm sorry for not making it clear. WPS is a pdf/word viewer app, > which can be downloaded from Play Store. > > I tried to view those pdfs in "sent" folder and succeeded. But in > the inbox of the email I sent to, they cannot be opened > correctly. However, if I add attachments in K-9 directly from > file explorer, there is no problem. So I think it is a issue > related to sharing pdfs from WPS to K-9. > > On Thursday, August 27, 2015 at 1:53:47 AM UTC+8, Richard wrote: >> >> >> > Date: Wednesday, August 26, 2015 03:14:12 -0700 >> > From: Junnan Zhang <[email protected] <javascript:>> >> > >> > Hello everyone, my phone is Samsung S6 Edge, Android 5.0.2, >> > rooted. I find that K-9 mail cannot correctly send pdf files >> > shared from WPS. It seems all right when composing, but the >> > pdf attachments cannot be opened (maybe impaired I think) in >> > the inbox. I tried other email clients (like bluemail) with >> > no problem. So I believe it is related to K-9. Does anybody >> > know the reason? >> >> What is "WPS" in this context? It may be something obvious, but >> not to me. >> >> When you are having trouble viewing the pdfs (after sending from >> K-9), are you trying to view then with K-9 or some other email >> client, if so what? >> ------------ End Original Message ------------ -- -- You received this message because you are subscribed to the K-9 Mail Users List. To post to this group, send email to [email protected] To unsubscribe, email [email protected] To report an issue with K-9 Mail, visit http://code.google.com/p/k9mail/issues/list For more options, visit this group at http://groups.google.com/group/k-9-mail --- You received this message because you are subscribed to the Google Groups "K-9 Mail" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
