More information is available at the community portal. You may ask questions at the help desk, village pump or on IRC channel #wikimedia-commons (webchat). You can also contact an administrator on their talk page. If you have a specific copyright question, ask at the copyright village pump.
File:Apollo-Optik Logo 1024px.jpg has been marked as a possible copyright violation. Wikimedia Commons only accepts free content—that is, images and other media files that can be used by anyone, for any purpose. Traditional copyright law does not grant these freedoms, and unless noted otherwise, everything you find on the web is copyrighted and not permitted here. For details on what is acceptable, please read Commons:Licensing. You may also find Commons:Copyright rules useful, or you can ask questions about Commons policies at the Commons:Help desk.
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Re your email
Dear Admin, you recently deleted our logo "Apollo Optik" from wikimedia commons. Now I am the Online Marketing Manager of Apollo Optik GmbH and my action to update the logo was perfectly ok. Please undelete, if possible or give advice how I can update our logo for our Wiki presence. Thank you. Cheers, (name removed), Apollo-Optik GmbH
To correct your statement. I deleted one of the versions of the upload as it was duplicate
23:02, 19 March 2014 Billinghurst (talk | contribs | block) deleted page File:Apollo-Optik Logo 400px.jpg (Exact or scaled down duplicate: File:Apollo-Optik Logo 1024px.jpg)
and I nominated the other for deletion on the basis of a copyright violation. That other copy was assessed as being so, and deleted with the comment
00:00, 20 March 2014 Fastily (talk | contribs | block) deleted page File:Apollo-Optik Logo 1024px.jpg (Copyright violation: If you are the copyright holder/author and/or have authorization to upload the file, email COM:OTRS)
So your desired advice is suitably contained. So if you wish to cede the copyright of your organisation's logo to the public domain in some form, then please identify the tag to be used at Commons:Copyright tags, then follow the process at Commons:OTRS, and make contact regarding File:Apollo-Optik Logo 400px.jpg and we will apply an OTRS tag that confirms that release with the chosen licence. (@Fastily: for your info) — billinghurst sDrewth 13:40, 26 March 2014 (UTC)
File:Apollo-Optik Logo 1024px.jpg has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry.
If you created this file, please note that the fact that it has been proposed for deletion does not necessarily mean that we do not value your kind contribution. It simply means that one person believes that there is some specific problem with it, such as a copyright issue.