A YAMM alternative for outreach that needs a second email
If you are looking for a YAMM alternative because one send is not enough, Innmail adds up to four follow-ups in the same thread that stop when the person replies. If a single merge from a sheet is all you need, YAMM already does that well.
Start free with your own mailboxWhy people outgrow a one-off mail merge
YAMM, short for Yet Another Mail Merge, is a Google Sheets add-on for one-off mail merges, without a built-in multi-step sequence. That is a good fit for an event invite or a class update.
Outreach is different. When you write to a potential customer or an investor, the first email is often not the one that gets a reply. People look for a YAMM alternative when they catch themselves tracking who answered in a spreadsheet and writing every nudge by hand.
What a YAMM alternative with follow-ups should do
The follow-up has to land in the same conversation, not as a fresh email that looks like a blast. It has to stop the moment someone answers. And it should never go to someone who unsubscribed or bounced.
Innmail does each of those. Follow-ups thread in Gmail or use reply headers over SMTP. Replies and bounces are detected from your mailbox over IMAP. Every campaign email carries a one-click unsubscribe link, and suppressed addresses are never emailed again.
Keeping it personal as you add steps
More steps can make outreach feel automated, so Innmail keeps you in the loop. Every first email waits in a review queue where you can edit it for that person, approve it or skip it. Preview each email shows every message before anything sends, and AI can write a per-contact variable so each opener says something specific.
Sends go out one at a time from your real address with a randomized delay, inside working hours you set, under a daily cap.
When YAMM is still the right tool
Keep YAMM for one-off sends from a sheet, especially announcements where a follow-up would feel odd. It lives where your data already is, and you never leave Google Sheets.
Innmail and YAMM at a glance
| Innmail | YAMM | |
|---|---|---|
| Sends from | Your one real Gmail or SMTP/IMAP mailbox | Your Gmail or Google Workspace account |
| Where you use it | Web app and Chrome side panel | Google Sheets add-on |
| Follow-ups | Up to four, in the same thread, stop on reply | No built-in multi-step sequence |
| Built for | Personal one-to-one outreach you approve email by email | One-off mail merges from a sheet |
| Pricing model | Free daily credits; optional credit packs or monthly credits | Free tier plus per-user plans |
Based on each product's public description as of 2026. Check YAMM's site for current details.
Frequently asked questions
Does Innmail work from Google Sheets like YAMM?
No, it works from a CSV upload or pasted contacts. Export your sheet as a CSV and each column becomes a personalization variable.
How many follow-ups can I send?
Up to four after the first email, for five steps in total. Each one lands in the same thread and stops automatically when the person replies.
Can I send from a mailbox that is not Gmail?
Yes. Innmail connects to Gmail or to any provider over SMTP and IMAP with an app password, including Zoho, Fastmail, iCloud and your own host.
Could a follow-up go out twice?
No. A send reservation makes sure each step goes to each person at most once.
Is Innmail free to use?
Yes, up to 500 free credits every day, where one credit is one send your provider accepts. Credit packs and month-to-month plans are there if you need more.
Personal outreach, one email at a time.
Connect your Gmail or any SMTP mailbox, approve each email, and let follow-ups stop the moment someone replies. 500 free credits every day.
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