- #COMMUNIGATE PRO POP IMAP LINKED FROM UPDATE#
- #COMMUNIGATE PRO POP IMAP LINKED FROM PASSWORD#
Impose "'From' Address Restrictions" and "'From' Name Restrictions" in Outgoing Mail Transfer Settings.That will reduce the rate a hacker will be able to send messages. Impose tighter limits for "Outgoing Mail Limit", "Outgoing Recipients Limit" and "Max Recipients per Message" in Outgoing Mail Transfer Settings.To reduce the damage caused by compromised Accounts, and to make them to be less attractive for hackers: Enable the Hide 'Account Unknown' messages to hinder address harvesting.Temporarily Blocked IP Addresses in Settings->Network->"Blacklisted IPs" page."Failed Logins Limit" in the Account Settings page.Force Two-factor Authentication, if possible.Force users to have enough long and complex passwords which cannot be guessed easily.That will prevent hackers from learning passwords via network sniffers. Make sure all users use encrypted connections (SSL/TLS) when commuicating with the server.In order to lower the chances of the users' passwords becoming compromised: The messages which are being processed may not be rejected, so you may need to repeat this step several times. Use the Reject All Sender's Messages button to clean the Queue.Temporary disable the Mail service to stop submitting mail from existing logins.
#COMMUNIGATE PRO POP IMAP LINKED FROM PASSWORD#
Reset or disable the password to prevent new logins. Open the compromised Account Settings page. Click the Reject All Sender's Messages button. Open one of such messages to learn the compromised Account name and the sender's IP address. There you should see a lot of messages with similar size and contents. Open the Mail page in the WebAdmin Monitors realm, and open the Queue page. Note that this case has nothing to do with open relaying. Someone had learned/guessed the password of an Account and uses that Account to send spam. the "Relay to Hosts We Backup:" is disabledĪn Account was compromised and my server is being used for mass mailing. the "Relay to Client IP Addresses: If Sent to:" is set to simple or none. the "Relay to any IP Address: If Received from:" is set to clients or nobody. If you receive all mail from a gateway - do NOT add the gateway address to the Client IP Addresses list, but add it to UnBlacklistable (White Hole) IP Addresses list. Relaying for non-authenticated senders is possible if the sender had connected from an address from theĬlient IP Addresses list, so make sure there are no excessive addresses there ideally that list should be empty and all your users must authenticate when sending. If you receive a lot of mail/spam from unknown origin, but the targets are your local users, then it has nothing to do with relaying relaying means sending through your server to external targets.With the default settings CommuniGate Pro is configured NOT to be an open relay, it relays only e-mails (calls) submitted by senders who had authenticated. Open Relay is an SMTP (or SIP) server configured in such a way that it allows anyone on the Internet to send e-mail (or make calls) through it, not just mail destined to or originating from known users. Provides the suggestions that should help you to solve those problems. This section lists the most common problems with the CommuniGate Pro installations, and it How can I make my formmail-type CGI work with CommuniGate Pro?. What is that non-standard UDP port the CommuniGate Pro Server opens on my system?. What do these DNR-16538(xxx.xx.x.xx.) A:host name is unknown records mean?. Every time I access the WebAdmin interface, a Failure-type ROUTER record appears in the Log. The time stamps in messages sent or received with CommuniGate Pro are several hours off. #COMMUNIGATE PRO POP IMAP LINKED FROM UPDATE#
Attempts to update Account Settings result in theĭirectory record with the specified DN is not found error.Microsoft LDAP (Outlook and Outlook Express) users cannot find Directory records.What does the "unassigned local network address" error mean?.WebUser sessions are disconnected almost immediately after login.WebUser connections return the pink page saying "we do not provide Web Access to this domain".My Server cannot send mail to some host using SSL/TLS.My Server does not accept mail from my Web script/applet.When I try to log in, I get the "access from your network is denied" error.I have created a secondary Domain and now I cannot log into WebAdmin.I have rerouted the Postmaster account and now I cannot log in as the Postmaster.An Account was compromised and my server is being used for mass mailing.
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