Light-touch handling and high availability

Smarthost applies the right tools for outbound mail — protective, but not the inbound spam engine:

• ClamAV virus scanning on every attachment, so a compromised account can't blast malware out under your name.
• Rate limiting at 2,000 messages/day per account by default — if you exceed it we contact you rather than surprise-bill.
• Optional DKIM signing on request (most customers already sign at their own server).
• Full logging — every outbound message appears in your dashboard tagged outbound, showing who sent what, when, to whom, and whether it was accepted.

Importantly, MxGuard deliberately does not run the inbound AI spam classifier on your outbound mail — those models are trained to judge mail sent to you, not by you, and applying them backwards would false-positive your legitimate business mail.

Reliable by design: active-active high availability across both gateways — mx1 (UK) and mx2 (EU) both accept submissions. If one node is down, your server's connection simply succeeds on the other, with no manual failover.