Zapier supports tons of services and you can use almos all of them to automate your Postach.io blog:
I'll show you how to automate Twitter, but you can use any other service.:
Step 1
Choose source and destination. In my case: Twitter and Evernote.
Step 2 and 3
Confirm your choice.
Step 4
Define filter for Zapier trigger. I choose hashtag #blog. All tweets with this hastag will be published in my blog.
Step 5
On this step you should configure Evernote integration. Choose your blog notebook. Zapier can create automatically content and headers. You just need to define filters and add tag published.
Steo 6
Check your trigger.
Step 7
Save it.
Don't forget to subscribe my RSS-channel or Twitter.