Settings for SMTP IP addresses to be released via individual Zimbra after DNS check is enabled in the

1, the use of Zimbra process, there are more use of dynamic IP at random to send false senders of spam, in order to shield off such messages, you need to Zimbra Management page options: Configure---MTA check the following option,

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2. After setting this option, it is obvious that many fake senders ' spam messages are directly blocked by the system and will not go into the user's Inbox or junk mail box. But there is another problem, and individual customers ' emails will be blocked out. Errors such as:

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3, first query Zimbra log file, check the blocked client mail sent SMTP server IP, and then use Nslookup to query the customer mail system MX records, found that 2 address does not match, or the customer's SMTP address does not have the corresponding domain name binding, The reason may be that the client set up a mail filtering system in front of the mail system that caused the increased IP to be inconsistent with the original MX record, or for other reasons.

After the reason is found, it is not realistic to notify the customer to modify the MX record, so modify the native Hosts file to allow the mail system to pass the client SMTP IP address check.

Vi/etc/hosts Add Customer IP Access

58.210.xxx.xxx mail.sz-xxx.com

222.92.xxx.xxx mail.pxx.com.cn

: Wq Save Launch

Cat/etc/hosts as shown:

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4. Restart the Web Services service network Restart after the modifications are completed

Settings for SMTP IP addresses to be released via individual Zimbra after DNS check is enabled in the