| undefine(`UUCP_RELAY') | No UUCP relay |
| undefine(`BITNET_RELAY') | No BITnetrelay |
| define(`confAUTO_REBUILD') | Automatically rebuild alias db |
| define(`confTO_CONNECT', `1m') | Connect timeout maximum |
| define(`confTRY_NULL_MX_LIST',true) | Try direct connect to host |
| define(`confDONT_PROBE_INTERFACES',true) | Don't insert local interfaces. |
| define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail') | Location of procmail |