Question from a newcomer.

You may not submit images for which you are not the copyright owner. Additionally, old photos rarely meet Adobe's quality standards. 

NO.  You cannot submit work by other artists.

Besides, vintage photos probably won't have the necessary quality & details to be suitable for Stock.

No. All assets submitted to Adobe Stock must be 100% created by the contributor.

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

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