Oh ho! If it is email marketing info you're interested in... mjml.io/ is an excellent framework to code your emails in. It has its own markup language that you compile with either a node module or you can use their desktop builder. It compiles into cross-platform compliant code for all email clients!
I also get the newsletter from reallygoodemails.com/. They often have good ideas!
Now you have me wanting to do a writeup about things I had learned from having my own web services corporation!
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