If you are using Zimbra Mail and you are not able to send any mails and also you see an Error Message "not enough free space in mail queue" under /var/log/message. Then you should try out this solution.
1. Login to the server, and then again login as zimbra as follows:
#su - zimbra
2. Check 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
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.
You could try out this solution for Error: "SMTP Server Reported: 452 4.3.1 Insufficient System Storage"
1. Login to the server, and then again login as zimbra as follows:
#su - zimbra
2. Check 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
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.
You could try out this solution for Error: "SMTP Server Reported: 452 4.3.1 Insufficient System Storage"
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