ZCS Administrator's Guide Network Edition 6.0, Rev 1

Zimbra IMAP/POP Proxy

Zimbra Proxy Ports for POP/IMAP

Setting up IMAP/POP Proxy after HTTP Proxy

Zimbra IMAP/POP Proxy allows end users to access their Zimbra Collaboration Suite (ZCS) account using end clients such as Microsoft Outlook, Mozilla Thunderbird, or other POP/IMAP end client software. End users can connect using POP3, IMAP, POP3S (Secure POP3), or IMAPS (Secure IMAP).

For example, proxying allows users to enter imap.example.com as their IMAP server. The proxy running on imap.example.com inspects their IMAP traffic, does a lookup to determine which backend mailbox server a user’s mailbox lives on and transparently proxies the connection from user’s IMAP client to the correct mailbox server.

Zimbra Proxy Ports for POP/IMAP

The following ports are used either by Zimbra Proxy or by Zimbra Mailbox. If you have any other services running on these ports, turn them off.

End clients connect directly to Zimbra Proxy, using the Zimbra Proxy Ports. Zimbra Proxy connects to the Route Lookup Handler or Zimbra Mailbox using the Zimbra Mailbox Ports.

 

Zimbra Proxy Ports	Port
POP3	110
POP3S (Secure POP3)	995
IMAP	143
IMAPS (Secure IMAP)	993
Zimbra Mailbox Ports	Port
Route Lookup Handler	7072
POP3 Proxy	7110
POP3S Proxy	7995
IMAP Proxy	7143
IMAPS Proxy	7993

Setting up IMAP/POP Proxy after HTTP Proxy

Zimbra Proxy is installed with ZCS and is set up during Installation from the ZCS configuration menus. Zimbra proxy must be installed on the identified proxy nodes in order to set up HTTP proxy. No other configuration is usually required.

To set up IMAP/POP proxy after you have already installed Zimbra http proxy, set up the Zimbra mailbox server and the proxy node as described in the following two sections.

Note: You can run the command as zmproxyconfig -r, to run against a remote host. Note that this requires the server to be properly configured in the LDAP master.

Setting Up IMAP/POP Proxy With Separate Proxy Node

When your configuration includes a separate proxy server follow these steps.

Setup Zimbra Mailbox Servers

1.	On each Zimbra mailbox server that you want to proxy with, enable the proxy for IMAP/POP proxy. Type

/opt/zimbra/libexec/zmproxyconfig -e -m -H mailbox.node.service.hostname

This configures the following:

•	zimbraImapBindPort to 7143

•	zimbraImapProxyBindPort to 143

•	zimbraImapSSLBindPort to 7993

•	zimbraImapSSLProxyBindPort to 993

•	zimbraPop3BindPort to 7110

•	zimbraPop3ProxyBindPort to110

•	zimbraPop3SSLBindPort to 7995

•	zimbraPop3SSLProxyBindPort to 995

•	zimbraImapCleartextLoginEnabled to TRUE

•	zimbraReverseProxyLookupTarget to TRUE

•	zimbraPop3CleartextLoginEnabled to TRUE

2.	Restart services on the proxy and mailbox servers, run

a.	zmcontrol stop

b.	zmcontrol start

Setup Proxy Node

1.	On each proxy node that has the proxy service installed, enable the proxy for the web. Type

/opt/zimbra/libexec/zmproxyconfig -e -m -H proxy.node.service.hostname

This configures the following:

•	zimbraImapBindPort to 7143

•	zimbraImapProxyBindPort to 143

•	zimbraImapSSLBindPort to 7993

•	zimbraImapSSLProxyBindPort to 993

•	zimbraPop3BindPort to 7110

•	zimbraPop3ProxyBindPort to110

•	zimbraPop3SSLBindPort to 7995

•	zimbraPop3SSLProxyBindPort to 995

•	zimbraReverseProxyMailEnabled to TRUE

Setting Up a Single Node

When Zimbra proxy is installed along with ZCS on the same server, follow this step.

1.	Enable the proxy for the web. Type

/opt/zimbra/libexec/zmproxyconfig -e -m -H mailbox.node.service.hostname

This configures the following:

•	zimbraImapBindPort to 7143

•	zimbraImapProxyBindPort to 143

•	zimbraImapSSLBindPort to 7993

•	zimbraImapSSLProxyBindPort to 993

•	zimbraPop3BindPort to 7110

•	zimbraPop3ProxyBindPort to110

•	zimbraPop3SSLBindPort to 7995

•	zimbraPop3SSLProxyBindPort to 995

•	zimbraImapCleartextLoginEnabled to TRUE

•	zimbraReverseProxyLookupTarget to TRUE

•	zimbraPop3CleartextLoginEnabled to TRUE

•	zimbraReverseProxyMailEnabled to TRUE

2.	Restart services on the proxy and mailbox servers, run

a.	zmcontrol stop

b.	zmcontrol start

ZCS Administrator's Guide Network Edition 6.0, Rev 1