PDF's attached with "Content-Disposition: inline" will not forward
Posted: Fri Feb 08, 2019 4:35 pm
I currently upgraded from
Release 8.7.10.GA.1829.UBUNTU12.64 UBUNTU12_64 FOSS edition.
to
Release 8.8.11.GA.3737.UBUNTU14.64 UBUNTU14_64 FOSS edition, Patch 8.8.11_P2.
I started having reports that some attachments would not show up in the client compose window when forwarded. It's as if the original email had no attachment. Strangely enough, it seems only to happen with certain types of PDF's, but not all. After my investigation, it turns out that the issue for the missing PDF's lies in how it was attached originally. When looking at the source code of the email (right click, show original), all the PDF's that would not attach have "Content-Disposition: inline; ". Normally, if I hit reply, I would also see an open to "Add attachments from original message". This is not so with PDF's attached "inline". But any email with a PDF and "Content-Disposition: attachment;" will forward properly and is able to be attached on a reply. I just tested also by sending myself a picture from my iphone. The source for the image is "inline" as the Content-Disposition. It will not forward nor show up in a reply. Our current work-around is to save it, hit forward or reply in order to keep mail chain, then re-attach. Not terrible for some but for others it's torture.
This only happens when using the ZCS Web Client which is what all of my users have. Can anyone clue me in on a fix?
Thanks
Fil
Release 8.7.10.GA.1829.UBUNTU12.64 UBUNTU12_64 FOSS edition.
to
Release 8.8.11.GA.3737.UBUNTU14.64 UBUNTU14_64 FOSS edition, Patch 8.8.11_P2.
I started having reports that some attachments would not show up in the client compose window when forwarded. It's as if the original email had no attachment. Strangely enough, it seems only to happen with certain types of PDF's, but not all. After my investigation, it turns out that the issue for the missing PDF's lies in how it was attached originally. When looking at the source code of the email (right click, show original), all the PDF's that would not attach have "Content-Disposition: inline; ". Normally, if I hit reply, I would also see an open to "Add attachments from original message". This is not so with PDF's attached "inline". But any email with a PDF and "Content-Disposition: attachment;" will forward properly and is able to be attached on a reply. I just tested also by sending myself a picture from my iphone. The source for the image is "inline" as the Content-Disposition. It will not forward nor show up in a reply. Our current work-around is to save it, hit forward or reply in order to keep mail chain, then re-attach. Not terrible for some but for others it's torture.
This only happens when using the ZCS Web Client which is what all of my users have. Can anyone clue me in on a fix?
Thanks
Fil