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Zimbra Mail Error: not enough free space in mail queue

While you are sending mails zimbra server and getting Error Message as “not enough free space in mail queue” under /var/log/zimbra.log Then you should try out this solution.

Step 1. Login into the server, and then login as zimbra as follows:

#su – zimbra

Step 2. verify the Postfix message_size_limit, by default it should be 10MB (i.e. ‘10240000’ bytes) as follows:

$postconf message_size_limit
message_size_limit = 10240000

Step 3. If the value is higher than that, set it as follows to 10MB

$ zmprov modifyConfig zimbraMtaMaxMessageSize 10240000
$ postfix reload

Now try sending Mail, It should work.

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I am founder and webmaster of www.linuxpcfix.com and working as a Sr. Linux Administrator (Expertise on Linux/Unix & Cloud Server) and have been in the industry from last 7 years.

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