Product
Send from the right project address with SMTP
Use one authenticated SMTP relay for every Sixuse identity, so replies and notifications come from the address your customers recognize.
Set up SMTP sendingOne relay for every project
Sixuse gives your account a single SMTP credential that can send through the identities you own. Choose the appropriate From address for each product, support queue, or founder workflow.
- STARTTLS submission on port 587
- Project identity authorization
- Per-account sending quotas
- Custom-domain DKIM support after verification
Keep sending independent from Gmail changes
Delegated sending and SMTP relay workflows let project mail use your own infrastructure boundary instead of relying on a third-party mailbox's “Send as” behavior.
Read about delegated sending or configure a custom domain.