Zimbra Forums

I think a big part of my problem was that my router was not 1:1 masquerading properly. The NAT rule was not mapping one internal address to one external address correctly. I recently received a Mikrotik router for testing on a job I'm doing in a couple of weeks. The 1:1 nat was not configured correc...

OK. Thanks to your help I have stopped the spam and closed the open relay. The only weird thing is that all the sender mail shows up as originating from my gateway. Spamcop gives me the message: Your email host does not appear to correctly identify the sending IP of the email you receive. The last a...

In the Protocol checks & DNS checks, what should I optimally check. In my frustration I have ended up checking them all.

I thought of that. My next step is to try and disable all of the domains. And see if it stops. But when I stop the open relay I am getting messages like this in the log: Jun 10 15:51:07 zmail postfix/smtpd[13544]: NOQUEUE: reject: RCPT from unknown[192.168.1.24]: 554 5.7.1 <michael4chen@yahoo.com.tw...

This is ridiculous! The system was working fine for almost 10 years and now we are basically crippled! I am running out of options here...

All other tests pass OK: SMTP Reverse DNS Mismatch OK - 69.165.220.191 resolves to zmail.myriad.ca SMTP Valid Hostname OK - Reverse DNS is a valid Hostname SMTP Banner Check OK - Reverse DNS matches SMTP Banner SMTP TLS OK - Supports TLS. SMTP Connection Time 0.718 seconds - Good on Connection time ...

Followed the step:zmprov mcf zimbraMtaSmtpdSenderLoginMaps proxy:ldap:/opt/zimbra/conf/ldap-slm.cf +zimbraMtaSmtpdSenderRestrictions reject_authenticated_sender_login_mismatch Now I am receiving mail but the spammers are back (66 messages in the deferred queue already) and the open relay test fails ...

OK. Getting some progress here. I have closed the open relay using the local IP and not the local subnet. The only change on the server has been a new static IP assigned by the ISP. Here are the relay results: Connecting to 69.165.220.191 220 zmail.myriad.ca ESMTP Postfix [624 ms] EHLO MXTB-PWS3.mxt...

Doesn't work: [Method 0 @ 1433945626] <<< 220 zmail.myriad.ca ESMTP Postfix >>> HELO mailradar.com <<< 250 zmail.myriad.ca >>> MAIL FROM: <antispam@mailradar.com> <<< 250 2.1.0 Ok >>> RCPT TO: <relaytest@mailradar.com> <<< 250 2.1.5 Ok >>> QUIT <<< 221 2.0.0 Bye [TEST NOT PASSED]

mynetworks = 127.0.0.0/8 192.168.1.0/24