Cor­rupted email images

Mac Format - - MAC SOS -

I once was able to send and re­ceive pic­ture email of any qual­ity, in­clud­ing TIFFs. Re­cently, the largest pic­tures I can send and re­ceive are medium JPEG. I’m run­ning an iMac on OS X 10.6.8 and a 13-inch Mac­Book on OS X 10.6.8. (The Mac­Book pic­tures are less cor­rupted.) I’ve checked ev­ery set­ting on Mail, Sa­fari and In­ter­net Util­ity, to no avail… A J Brookes This is a sub­tle and long-stand­ing bug in the way that Mail han­dles 64-bit mes­sage en­cod­ing. I first saw it with Lion and it has per­sisted through Moun­tain Lion and Mav­er­icks. I haven’t had pos­i­tive con­fir­ma­tion that it’s still there in Yosemite, but I haven’t seen a change log that re­ports it fixed yet, ei­ther. It’s caused when email at­tach­ments are con­verted us­ing the base64 en­cod­ing sys­tem, so that they can be ac­cepted by email servers. Anec­do­tally, it seems that drag­ging an im­age into an email that al­ready con­tains some text can oc­ca­sion­ally trig­ger the prob­lem, but at­tach­ing it us­ing File > At­tach Files never will.

What’s more cer­tain is that at­tach­ing images through a web­mail in­ter­face (such as gmail.com) never causes the prob­lem. You may be able to fix ex­ist­ing cor­rupted images by en­ter­ing de­faults write com. ap­ple.mail Dis­ableIn­lineAt­tach­ment View­ing -bool yes in Ter­mi­nal and then click­ing Mail­box > Re­build in Mail, to force them to down­load from the server again.

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