Mysql not accepting some mails
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 fetchmail, postfix, kopano are working 100 to 200 of our daily mails. 
 But in the mailq remain daily 8 to 12 mails.
 The deferred mails are not specifically big or html, mixed or containing binaries.
 Nor is postfix complaining the content as beeing not standard conform.postfix says: 450 mailbox temporarily not availabledagent says: Unable to deliver message to "zentrale": disk error (80040116)server.log says: [error ] SQL [00454463] Failed: MySQL server has gone away, Query Size: 1028280, Query: "REPLACE INTO properties (hierarchyid,tag,type,properties.val_ulong,properties.val_string,properties.val_binary,properties.val_double,properties.val_longint,properties.val_hi,properties.val_lo) VALUES(415741,34062,30,null,'JAS STD',null,null,null,null,null),(415741,34065,30,null,'notjunk:1;V01:K0:2qWpGnVIiKI=:v4qQb0q7HSuM6C4pvbP7Lk+eKw H7f9iz/RTEk6Si2eAFYQYhhMaHQ [...] \0\0\0\0<AC>!<A9>P@<D3><EE>H<B3>^Y<FB><A7>S0D%^A\0\0\0^F\0\0\0^F\0\0\0lBPUbAt6Ts+NIwBUW9QXuw==\0\0\0\0',null,null,null,null),(415741,64,30,null,'Zentrale',null,null,null,null,null),(415741,65,258,null,null,'\0\0\0\0<81>+^_<A4><BE><A3>^P^Y<9D>n\0<DD>^A^OT^B\0\0^A<80>E\0u\0 [..] Sun Jun 17 06:48:18 2018: [warning] SQL [00454477] info: Try to reconnect Sun Jun 17 06:48:18 2018: [warning] SQL [00454281] info: Try to reconnect Sun Jun 17 06:48:18 2018: [error ] SQL [00454479] Failed: MySQL server has gone away, Query Size: 1324594, Query: "REPLACE INTO properties (hierarchyid,tag,type,properties.val_ulong,properties.val_string,properties.val_binary,properties.va [...]At present there is no mention in the mariadb error.log. 10.1.26-MariaDB-0+deb9u1 Debian 9.1 
 kopano Version 8.6.80.45-0+ amd64Any suggestions? Thanks, if anybody has a clue! Klaus 
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 Hi @kkappel , @kkappel said in Mysql not accepting some mails: kopano Version 8.6.80.45-0+ amd64 you are using quite an old version. This was a known issues on Debian 9 a while ago that we meanwhile have fixed. Therefore I advise to upgrade. 
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 Hi there, unfort. in Univention 4.3.1 there ist still kopano 8.4.5.0 the newest version available. Is there any reference to where to find more information about this bug? Some workaround? Thanks 
 lacroix
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 When running Univention and you have a Kopano subscription, then you can update your Kopano version through https://wiki.z-hub.io/display/K4U/Updating+Kopano+packages+directly+from+the+Kopano+download+server. The related Jira issue was https://jira.kopano.io/browse/KC-1053 If you don’t have a Kopano subscription, then there is currenly an update for the Univention app in the pipeline. If everything goes well, then is should be online beginning of next week. 
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 Thanks a lot for pointing that out! Upgrade to 8.6.80.1055-0+156.1_amd64.deb did the job! If anyone is interested in our repository: http://apt.jugendhilfe-wuemmetal.de While updating dagent did not work out of the box. I had to remove: 
 #server_bind = 127.0.0.1
 #lmtp_port = 2003
 which helped to start the daemon.Great Work, 
 we love Kopano!Klaus Kappel 
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 I did a downgrade from the unmaintained repo. Downgraded libmariadb2 to 2.0.0-1 , but SQL server is not on the same host. This seems a problem with the client library only. #ucr set repository/online/unmaintained=yes 
 #aptitude install libmariadb2=2.0.0-1
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 @lacroix why that downgrade? the update is available since monday. did it not solve your issue? 
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 @felix no I missed that. So this is good news. Thanks. 
 
			
		