Recommended stacks
Start from a stack that already works. Each one shows the tools that fit together, layer by layer, with an alternative for every pick.
The online-store email stack Marketing flows that read your store, with receipts kept safely apart. 5 layers → The B2B outbound stack Cold email that protects your main domain and lands in the inbox. 5 layers → The SaaS product email stack Instant transactional mail, plus lifecycle email that knows your product. 5 layers → The newsletter stack A list you own, growth you control, and complaints kept well under the line. 5 layers →