This task can be performed using Cleanbox
Email aliases, AI spam filtering, and a full SMTP relay
Set Up SMTP Relaying
This setup is for teams that want shared aliases, controlled outbound sending, or better filtering while keeping Gmail or Outlook as the everyday inbox. The trigger is usually adding a domain, an application sender, or consistent team-wide mail rules.
Map every sending app and alias, route outbound mail through the SMTP relay, and keep replies forwarding to existing inboxes. A good result is authenticated delivery, predictable sender identities, clean inbound routing, and no mailbox migration.
Best product for this task
Cleanbox
productivity
Cleanbox sits between the internet and your inbox. Every incoming email goes through spam scoring, virus scanning, AI classification, and your own rules before delivery. Create unlimited aliases that forward to your real inbox, build custom filters, and use Cleanbox as a complete SMTP relay. Works with Gmail, Outlook, iCloud, Yahoo, or any IMAP provider, no migration needed. Privacy-first: no advertising, no data selling, no user profiling.
What to expect from an ideal product
- Works with any existing inbox provider (Gmail, Outlook, iCloud, Yahoo, or IMAP) without requiring account migration
- Provides a full SMTP relay so outbound mail routes through a single authenticated point regardless of which team member sends it
- Supports unlimited email aliases, letting teams create role-based or project-specific addresses without exposing real inboxes
- Applies AI spam scoring, virus scanning, and custom rules to every inbound message before delivery, reducing noise across shared aliases
- Privacy-first architecture with no advertising, user profiling, or data resale, which matters when routing business mail through a third-party relay
More about rollout order
Stage the change with a small sender group first. This isolates authentication, routing, and permission problems before they affect every person, alias, or application.
- Inventory domains, aliases, applications, ports, and required credentials before changing DNS or client settings.
- Test outbound delivery and reply routing with Gmail and Outlook accounts outside your domain.
- Review logs, failed sends, spam placement, and email security checks before expanding access.
More topics related to Cleanbox
Similar topics
- How to detect phishing, impersonation, spam, and malware before delivery
- How to set up an inbound SMTP relay with MX records and spam scanning
- Private Email Aliases That Forward to Your Existing Inbox
- How to put a spam-filtering security gateway before your inbox
- How to filter spam emails automatically before they reach your inbox
