---
title: mailDomains
framework: networkextension
role: symbol
role_heading: Instance Property
path: networkextension/netunnelprovidermanager/maildomains
---

# mailDomains

The mail servers that the system routes connections from the Mail app through for a per-app VPN.

## Declaration

```swift
var mailDomains: [String] { get set }
```

## Discussion

Discussion This property applies only to per-app VPNs.

## See Also

### Configuring a per-app VPN

- [forPerAppVPN()](networkextension/netunnelprovidermanager/forperappvpn().md)
- [appRules](networkextension/netunnelprovidermanager/apprules.md)
- [excludedDomains](networkextension/netunnelprovidermanager/excludeddomains.md)
- [associatedDomains](networkextension/netunnelprovidermanager/associateddomains.md)
- [calendarDomains](networkextension/netunnelprovidermanager/calendardomains.md)
- [contactsDomains](networkextension/netunnelprovidermanager/contactsdomains.md)
- [safariDomains](networkextension/netunnelprovidermanager/safaridomains.md)