Field notes · 7 min read
How to save competitor emails without crowding your inbox
Collect competitor newsletters with a dedicated address, preserve sender context, and organize useful examples without mixing research with personal mail.
The research library
A little structure. A better swipe file.
Practical guides for collecting marketing emails, keeping useful references, and choosing tools that fit your research. No campaign scores or magic formulas—just a clearer way to keep the good stuff.
Start here / The complete guide
How to build an email swipe file you’ll actually use
A simple structure for collecting, organizing, and returning to the emails worth keeping.
Read the swipe-file guideField notes · 6 min read
Automatically forward selected newsletters from Gmail
Forward only the newsletters you choose from Gmail to a research archive. Set up verification, narrow sender filters, and a test without Gmail OAuth.
Field notes · 7 min read
Import Gmail emails into a swipe file with EML or MBOX
Move selected Gmail newsletters into PromoStash using EML attachments or a small MBOX archive. Understand upload limits, duplicate handling, and what is preserved.
Comparison · 6 min read
Gmail vs PromoStash for an email swipe file
Should your email swipe file live in Gmail or a separate research inbox? Compare labels, collection workflows, capture, imports, and MCP access with optional collection writes.
Comparison · 6 min read
Milled vs PromoStash: discovery library or private archive?
Looking for a Milled alternative? Compare public email discovery with a private subscription archive, including history, collections, MCP access, and tradeoffs.
Comparison · 7 min read
Really Good Emails vs PromoStash: inspiration or your own archive?
Compare Really Good Emails with PromoStash for curated inspiration, private email capture, and MCP. Includes RGE Studio’s design-focused MCP beta and clear tradeoffs.