Integrations
Connect any mailbox, any provider
SendOut works with your existing email infrastructure. Gmail, Outlook, AWS SES, or any custom SMTP server — connect and start warming in minutes.
G
AvailableEmail Provider
Gmail / Google Workspace
- OAuth 2.0 — no password stored
- Full IMAP/SMTP access
- Alias support
M
AvailableEmail Provider
Microsoft 365 / Outlook
- OAuth 2.0 — no password stored
- Exchange Online support
- Shared mailboxes
A
AvailableTransactional Email
AWS SES
- IAM key authentication
- Region selection
- Bounce/complaint handling
S
AvailableTransactional Email
SendGrid
- API key authentication
- Subuser support
- Event webhook integration
P
AvailableTransactional Email
Postmark
- Server token auth
- Message streams
- DKIM managed per server
MG
AvailableTransactional Email
Mailgun
- Domain-level API keys
- EU/US region support
- Suppression list sync
SMTP
AvailableGeneric
Custom SMTP
- Any SMTP/IMAP provider
- TLS/SSL/STARTTLS
- Port configuration
Z
Coming soonAutomation
Zapier / Make
- Trigger on campaign events
- Push contacts from CRMs
- Update sequences
Not seeing your provider?
Any server that supports SMTP and IMAP will work with SendOut. If your ESP exposes standard ports, you can connect it. Our generic SMTP connector handles TLS, STARTTLS, custom ports, and authentication schemes.
Request an integration587
STARTTLS
Standard submission port
465
TLS/SSL
Implicit TLS
993
IMAP over TLS
Inbox access
Custom
Any
Custom port support
Build on the SendOut API
The full Scale plan API lets you programmatically add mailboxes, trigger campaigns, and pull analytics. Automate your entire deliverability workflow.