If you send mail from a subdomain, you may not be able to add a TXT record for that subdomain. To use DKIM authentication, you can add the necessary TXT record to the parent domain.
Collections are analogous to tables in relational databases. If a collection does not exist, MongoDB creates the collection when you first store data for that collection.
Make online money from the Internet Create your own YouTube channel and become a YouTube partner to monetize your videos. You may use Oneload to distribute the same video to multiple video sites. Make something creative – like handbags, jewelry, paintings, craft items – and sell them on Etsy , ArtFire or eBay. Build your own online store with Shopify or SquareSpace and sell both physical goods and digital downloads. Sell everything from furniture to clothes to food. Create t-shirt designs and put them on Threadless , Zazzle and CafePress . Write a book and publish it on the Kindle store, Google Play and iBooks. You can also sell your ebook to other retailers through services like Smashwoods and BookBaby . Become an instructor at SkillShare and get paid for teaching your favorite subjects – from guitar to literature to yoga to foreign languages – to...
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