Unable to send mails with Attachment in HordeIf you are unable to send mails with attachments even-though mails are recieving, then check the horde temporary file permission.
First of all check /usr/share/psa-horde/config/conf.php for the temporary directory used by Horde.
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~]# cat /usr/share/psa-horde/config/conf.php | grep tmpdir
$conf['tmpdir'] = '/tmp';
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Check the permission of .horde file
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~]# ls -la /tmp/.horde
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If the ownership of the file would be apache.apache. Change it as below.
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~]# chown -R horde_sysuser:horde_sysgroup /tmp/.horde/
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Hurray... Issue is fixed now. You will be able to send mails with attachment from now on.
Enjoy