If your team uses a custom email host (not Gmail or Outlook), or you need outbound at high volume, SMTP is the path.
Configure an SMTP account
- Go to
/app/email→ "Connect account" → "SMTP / IMAP". - Enter SMTP host, port (usually 587 with TLS), username and password (or app password).
- Configure IMAP for receiving: host, port (993 with TLS), credentials.
- Test the connection. Both directions must verify before saving.
Multi-account rotation
For high outbound volume — typical in collections workflows — connect multiple SMTP accounts (different from-addresses on the same domain or across domains). OMB Cloud rotates sends across accounts to protect domain reputation. Configure rotation rules under "Email pool settings".
Authentication best practices
- Use app-specific passwords if your provider supports them (more secure than your main password).
- Confirm SPF, DKIM and DMARC records are configured for your sending domain — otherwise messages land in spam.
- Never use port 25 for outbound — it's widely blocked and unencrypted.
When SMTP is the wrong choice
For day-to-day team email, Gmail or Outlook OAuth gives a better experience: native inbox, native sent folder, native conversation threading. SMTP is best for shared mailboxes, transactional sends, and outbound campaigns where you need rotation.