Asral said the following on 13/03/12 08:17 +07:00:
> Apakah log ini yg dimaksud pak? (kutipan)

Ya.

> Thu 2012-03-08 23:54:40: [5559:1] Session 5559; child 1; thread 10396
> Thu 2012-03-08 23:54:40: [5559:1] Accepting SMTP connection from 
> [118.97.50.147:36057]
> Thu 2012-03-08 23:54:40: [5559:1] --> 220 mail.ykkbi.or.id ESMTP MDaemon 
> 9.6.2; Thu, 08 Mar 2012 23:54:40 +0700
> Thu 2012-03-08 23:54:40: [5559:1] <-- EHLO JKTEXHT07-01.corp.bi.go.id
> Thu 2012-03-08 23:54:40: [5559:1] Performing IP lookup 
> (JKTEXHT07-01.corp.bi.go.id)
> Thu 2012-03-08 23:54:40: [5559:1] *  Error: *  Name server reports domain 
> name unknown
> Thu 2012-03-08 23:54:40: [5559:1] ---- End IP lookup results
> Thu 2012-03-08 23:54:40: [5559:1] --> 501 <JKTEXHT07-01.corp.bi.go.id> is 
> invalid or DNS says does not exist
> Thu 2012-03-08 23:54:40: [5559:1] SMTP session terminated (Bytes in/out: 
> 33/147)

Mail direject karena sender identity tidak terdaftar di authoritative
DNS (teroris nih <G>).

Disable saja reverse lookup PTR dan HELO checker

<http://mdaemon.dutaint.co.id/12.5.2/index.html?security__reverse_lookup.htm>

[ ] Perform PTR lookup on inbound SMTP connections
[ ] Perform lookup on HELO/EHLO domain

cukupkan dengan

[x] Perform lookup on value passed in the MAIL command

karena masih pakai MDaemon dibawah versi 11.0.2

-- 
syafril
-------
Syafril Hermansyah
MDaemon-L Moderators, running MDaemon 12.5.4 Release Edition
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