issue main.cf

Hi All

I'm very new using Carbonio, I Have couple problem with smtp when my other system send email using SQL,

1.if Set port 465 i have error 

Jun 12 09:59:52 mail postfix/smtps/smtpd[1057024]: connect from unknown[103.109.195.38]
Jun 12 09:59:52 mail postfix/smtps/smtpd[1057024]: SSL_accept error from unknown[103.109.195.38]: lost connection
Jun 12 09:59:52 mail postfix/smtps/smtpd[1057024]: lost connection after CONNECT from unknown[103.109.195.38]
Jun 12 09:59:52 mail postfix/smtps/smtpd[1057024]: disconnect from unknown[103.109.195.38] commands=0/0

2. if I set port 587 ssl i have error :

Jun 12 10:02:12 mail postfix/submission/smtpd[1061318]: SSL_accept error from unknown[182.253.20.148]: -1
Jun 12 10:02:12 mail postfix/submission/smtpd[1061318]: warning: TLS library problem: error:14209102:SSL routines:tls_early_post_process_client_hello:unsupported protocol:ssl/statem/statem_srvr.c:1685:
Jun 12 10:02:12 mail postfix/submission/smtpd[1061318]: lost connection after STARTTLS from unknown[182.253.20.148]
Jun 12 10:02:12 mail postfix/submission/smtpd[1061318]: disconnect from unknown[182.253.20.148] ehlo=1 starttls=0/1 commands=1/2

3. if I set Port 587 without ssl, I have error

Jun 12 10:04:38 mail postfix/submission/smtpd[1061318]: NOQUEUE: reject: RCPT from unknown[182.253.20.148]: 554 5.7.1 <unknown[182.253.20.148]>: Client host rejected: Access denied; from=<vendor.support@nasionallife.co.id> to=<vendor.support@nasionallife.co.id> proto=ESMTP helo=<BODEV>
Jun 12 10:04:38 mail postfix/submission/smtpd[1061318]: lost connection after RCPT from unknown[182.253.20.148]

4. every time i change my /opt/zextras/common/conf/main.cf, the old config always coming back after reload postfix, example, i just commenting some line, after reload the commenting line is back in main.cf. 

sender_canonical_maps =
smtpd_tls_received_header = yes
always_add_missing_headers = yes
lmtp_connection_cache_time_limit = 4s
smtpd_tls_mandatory_exclude_ciphers = aNULL, eNULL, EXPORT, DES, MD5, PSK
smtpd_tls_exclude_ciphers =
#smtp-slow_destination_recipient_limit = 2
#smtp-slow_destination_rate_delay = 5s
#smtp-slow_initial_destination_concurrency = 2
#smtp-slow_destination_concurrency_limit = 2
smtpd_discard_ehlo_keywords = chunking
smtp-slow_destination_recipient_limit = 2
smtp-slow_destination_rate_delay = 5s
smtp-slow_initial_destination_concurrency = 2
smtp-slow_destination_concurrency_limit = 2

is everybody know why the old config is always replace after reload, and where is the default main.cf?

syukie