| 1 | `ext_port`: `<integer> (1 - 65535)` ('default =' `25`):: |
| 2 | |
| 3 | SMTP port number for incoming mail (untrusted). This must be a different number than 'int_port'. |
| 4 | |
| 5 | `int_port`: `<integer> (1 - 65535)` ('default =' `26`):: |
| 6 | |
| 7 | SMTP port number for outgoing mail (trusted). |
| 8 | |