Semangat pagi Pak Syafril...

Pak.. ini ada marketing kirim email ke sesama ptbmi.com dak masuk dg SMTP-(in) 
sbb:

Mon 2018-10-01 17:51:43.121: [474441] Session 474441; child 0001
Mon 2018-10-01 17:51:43.121: [474441] Accepting SMTP connection from 
202.148.11.240:51075 to 172.16.0.6:25
Mon 2018-10-01 17:51:43.122: [474441] --> 220 bb.ptbmi.com ESMTP MDaemon 
18.0.2; Mon, 01 Oct 2018 17:51:43 +0700
Mon 2018-10-01 17:51:43.131: [474441] <-- EHLO smtp2-serv2.dnetsurabaya.id
Mon 2018-10-01 17:51:43.131: [474441] Performing SPF lookup 
(smtp2-serv2.dnetsurabaya.id / 202.148.11.240)
Mon 2018-10-01 17:51:43.329: [474441] *  Result: none; no SPF record in DNS
Mon 2018-10-01 17:51:43.329: [474441] ---- End SPF results
Mon 2018-10-01 17:51:43.329: [474441] --> 250-bb.ptbmi.com Hello 
smtp2-serv2.dnetsurabaya.id [202.148.11.240], pleased to meet you
Mon 2018-10-01 17:51:43.329: [474441] --> 250-ETRN
Mon 2018-10-01 17:51:43.329: [474441] --> 250-AUTH LOGIN PLAIN
Mon 2018-10-01 17:51:43.329: [474441] --> 250-8BITMIME
Mon 2018-10-01 17:51:43.329: [474441] --> 250-ENHANCEDSTATUSCODES
Mon 2018-10-01 17:51:43.329: [474441] --> 250-STARTTLS
Mon 2018-10-01 17:51:43.329: [474441] --> 250 SIZE 35840000
Mon 2018-10-01 17:51:43.353: [474441] <-- STARTTLS
Mon 2018-10-01 17:51:43.353: [474441] --> 220 2.7.0 Ready to start TLS
Mon 2018-10-01 17:51:43.398: [474441] SSL negotiation successful (TLS 1.2, 521 
bit key exchange, 256 bit AES encryption)
Mon 2018-10-01 17:51:43.479: [474441] <-- EHLO smtp2-serv2.dnetsurabaya.id
Mon 2018-10-01 17:51:43.479: [474441] Performing SPF lookup 
(smtp2-serv2.dnetsurabaya.id / 202.148.11.240)
Mon 2018-10-01 17:51:43.545: [474441] *  Result: none; no SPF record in DNS
Mon 2018-10-01 17:51:43.545: [474441] ---- End SPF results
Mon 2018-10-01 17:51:43.545: [474441] --> 250-bb.ptbmi.com Hello 
smtp2-serv2.dnetsurabaya.id [202.148.11.240], pleased to meet you
Mon 2018-10-01 17:51:43.545: [474441] --> 250-ETRN
Mon 2018-10-01 17:51:43.545: [474441] --> 250-AUTH LOGIN PLAIN
Mon 2018-10-01 17:51:43.545: [474441] --> 250-8BITMIME
Mon 2018-10-01 17:51:43.545: [474441] --> 250-ENHANCEDSTATUSCODES
Mon 2018-10-01 17:51:43.545: [474441] --> 250 SIZE 35840000
Mon 2018-10-01 17:51:43.556: [474441] <-- MAIL FROM:<a...@ptbmi.com> SIZE=38476 
BODY=7BIT
Mon 2018-10-01 17:51:43.558: [474441] --> 530 5.7.0 Authentication required
Mon 2018-10-01 17:51:43.558: [474441] a...@ptbmi.com may not send mail from 
202.148.11.240 (IP Shield)
Mon 2018-10-01 17:51:43.673: [474441] <-- RSET
Mon 2018-10-01 17:51:43.673: [474441] --> 250 2.0.0 RSET? Well, OK
Mon 2018-10-01 17:51:43.693: [474441] <-- QUIT
Mon 2018-10-01 17:51:43.693: [474441] --> 221 2.0.0 See ya in cyberspace
Mon 2018-10-01 17:51:43.693: [474441] SMTP session terminated (Bytes in/out: 
1055/4306)
Mon 2018-10-01 17:51:43.693: ----------

Salah setting di mana ya pak?
Client or Server?
Bagaimana cara antisipasinya?
Masukkan IP Dnet 202.148.11.240 ke Security – Sender Authentication – SMTP 
Authentication?

Mohon pencerahan...

thanks
Suzy
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