Hello @QuentinL06 ,
If I'm understanding what you're asking for, then yes this would be possible. You'd start by making a reusable template, so it's already setup and ready for copying/creating from. Then, you'd add Read More blocks, with the blog post's URL being used to generate that block. If you need to add additional blocks, it's as simple as copying the block and inserting a different URL. If you need to remove blocks, it's as simple as clicking the little trash can. Once you're done, you can send the email. The next time you have a series of blog posts to promote, you'd copy/create from the reusable template, then make the necessary edits.
See also:
Adding, arranging, and deleting blocks
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