Data loss when e-mailing files: is it relevant, and how to prevent it?

Only recently I came across the possibility that e-mailing files may change and damage those files. Especially when mailing *.jpgs to web-based mail servers like Gmail or Outlook.com: I wouldn’t be too surprised if these services re-compressed my files—possibly even stripping the colour profile in the process.

Since I do most of my file delivery by e-mail, this may be especially relevant when mailing *.jpg versions of logos and ads.

So here come my questions:

  1. Is there a risk of data loss occurring when mailing image files to certain mail services? If so, how big of an impact does it have, and on what file types? And what mail services should I look out for?
  2. How can I prevent such data loss? Is a *.zip protected from recompression?

Answer

I am not sure of “certain mail services” becouse there are millions. Every domain potentially has its own mail service.

But with the “big ones”, there is no risk. In all the years I have being using them I have never come across a recompressed image or modified file. In my opinion it has no sense.

But it would be interesting to have a more efficient way to send your files, like a cloud based drive or a ftp one.

Attribution
Source : Link , Question Author : Vincent , Answer Author : Rafael

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