Open source · Self-hostable

Cold outreach thatyou actually own

Build founder prospect lists, write rich campaigns, and send cold email through your own SMTP or Hostinger Mail account. No middleman, no per-email fees, no lock-in.

See how it works
300emails / day
1credit / email
0per-email fees
100%your sender
Workflow

Four steps to your first campaign

01

Connect a sender

Use SMTP credentials or a Hostinger Mail API token. Sender secrets are AES-encrypted before being saved.

02

Build a founder list

Search and filter founders from MongoDB, then save selected prospects into reusable named lists.

03

Write your campaign

Use the rich editor to craft polished emails with founder, company, and domain variables.

04

Launch outreach

Confirm upfront credit usage, start the campaign, throttle sends automatically, and watch results arrive.

Features

Everything you need. Nothing you do not.

OutreachMailer is purpose-built for founder outreach. It is not a bloated CRM or an expensive sending platform, just the tools required to search, write, send, and inspect.

300 emails/day

Verified founder emails

Reach each selected founder through the verified email stored in your database, with predictable credit usage and no extra sending fees.

Tiptap-powered

Rich campaign editor

Write formatted emails with links, lists, emphasis, and dynamic insertion tokens.

No shared pool

Your sender, always

Send through SMTP or Hostinger Mail so replies land in your inbox and reputation stays yours.

Search + filter

Prospect lists

Group founders into reusable audiences and send multiple campaigns to the same list.

Full audit trail

Send logs

Inspect every success, provider error, retry state, and campaign event from one clean history view.

Credential handling

SMTP passwords and Hostinger API tokens are encrypted before database storage.

Open source
Credit system

300 emails per day. Per sender account.

Credits are tied to your sender account, not just your login. Each sender receives 300 credits per 24-hour cycle. Each founder email or test email uses 1 credit, and the full campaign cost is charged at launch.

1 credit per emailEach founder email and each optional test email costs 1 credit.
Charged at launchThe full campaign cost is deducted when the campaign launches.
Sender-safe throttlingEmails are spaced apart per sender to avoid bulk-send spikes.

Sender account

you@domain.com

Active
Daily email capacity68% left
204 credits left96 used todayResets in 14h 22m

Per email

1

Daily cap

300

Credits left

204

Recent campaigns

YC S24 FoundersCompleted · 20 founders
AI Startups Q1Completed · 12 founders
Seed SaaS OperatorsSending · 9 founders
Sender Settings
Sender secrets are AES-encrypted before database storage. Open source, so you can audit the path anytime.

Sender setup

1Add SMTP credentials
2Or add Hostinger Mail API
3Choose a sender per campaign
4Send from your own inbox
Security

Your credentials, locked tight.

OutreachMailer encrypts SMTP passwords and Hostinger Mail API tokens before storage.

AES encryption at rest

SMTP passwords are encrypted before being written to MongoDB.

Provider-owned access

Use encrypted SMTP credentials or an encrypted Hostinger Mail API token.

No shared infrastructure

Every send uses your sender account, not a shared mail pool.

Get started

Reach more founders, on your terms

Add SMTP or Hostinger Mail, build your list, and launch your first campaign in minutes.

View on GitHub
Open sourceSelf-hostableNo per-email fees