View source for Not An IMAP4 Server

{{Archive}}{{Article Infobox|{{admin}}|{{ZCS 6.0}}|{{ZCS 5.0}}|}}
==Summary==
This error may be experienced when setting up IMAP in a Mozilla Thunderbird mail client to connect to a server running Zimbra proxy.

"Mail server {name} is not a IMAP4 mail server."

The issue is described here http://kb.mozillazine.org/Not_an_IMAP4_server.

==Cause==
The problem is likely due to one or more missing IMAP capabilities for the Nginx proxy that is included with ZCS.

==Solution==
Make sure the default list of IMAP capabilities is configured for the proxy server. 

===Check the running configuration===
At a shell prompt on the Zimbra proxy host as the ''zimbra'' user
<pre>
zmprov -l gs `zmhostname` zimbraReverseProxyImapEnabledCapability
</pre>

===Check the global configuration===
The multi-valued attribute zimbraReverseProxyImapEnabledCapability is inherited from the global configuration. For most installations, set IMAP capabilities in the global configuration so all Zimbra proxy nodes pickup the values.
<pre>
zmprov -l gcf zimbraReverseProxyImapEnabledCapability
</pre>

===Set the global configuration to defaults===
<pre>
zmprov -l mcf zimbraReverseProxyImapEnabledCapability ACL zimbraReverseProxyImapEnabledCapability BINARY \
zimbraReverseProxyImapEnabledCapability CATENATE zimbraReverseProxyImapEnabledCapability CHILDREN \
zimbraReverseProxyImapEnabledCapability CONDSTORE zimbraReverseProxyImapEnabledCapability ENABLE \
zimbraReverseProxyImapEnabledCapability ESEARCH zimbraReverseProxyImapEnabledCapability ESORT \
zimbraReverseProxyImapEnabledCapability I18NLEVEL=1 zimbraReverseProxyImapEnabledCapability ID \
zimbraReverseProxyImapEnabledCapability IDLE zimbraReverseProxyImapEnabledCapability IMAP4rev1 \
zimbraReverseProxyImapEnabledCapability LIST-EXTENDED zimbraReverseProxyImapEnabledCapability LITERAL+ \
zimbraReverseProxyImapEnabledCapability MULTIAPPEND zimbraReverseProxyImapEnabledCapability NAMESPACE \
zimbraReverseProxyImapEnabledCapability QRESYNC zimbraReverseProxyImapEnabledCapability QUOTA \
zimbraReverseProxyImapEnabledCapability RIGHTS=ektx zimbraReverseProxyImapEnabledCapability SASL-IR \
zimbraReverseProxyImapEnabledCapability SEARCHRES zimbraReverseProxyImapEnabledCapability SORT \
zimbraReverseProxyImapEnabledCapability THREAD=ORDEREDSUBJECT zimbraReverseProxyImapEnabledCapability UIDPLUS \
zimbraReverseProxyImapEnabledCapability UNSELECT zimbraReverseProxyImapEnabledCapability WITHIN
</pre>

Once the values are set, ''zmmtaconfig'' on each Zimbra proxy node will detect the changes and write the new configuration, then send a HUP signal to the Nginx proxy daemon. No restart is necessary. 

{{Article Footer|ZCS 5.0.x, 6.0.x|8/17/2010}}
[[Category: Troubleshooting]]
[[Category: ZCS 6.0]]
[[Category: ZCS 5.0]]