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How to fix Joomla ‘SMTP connect() failed’ error while sending mails
Joomla is a commonly used content-management software for websites. In Joomla, emails are used for various purposes such as contact form submissions or password resets. Joomla 'SMTP connect() failed' is a commonly encountered email error in Joomla, when users try to...
How to fix ‘553 sorry, unknown email address’ error in Outlook, Thunderbird and Outlook Express
'553 sorry, unknown email address' is a common email error that happens because the recipient address is invalid. The senders would see this error in the bounce message they receive. Error 553 is also called SMTP Error 5.5.3 and can happen irrespective of what mail...
How to fix ‘MySQL Remote Root Code Execution’ / ‘Privilege Escalation’ (zero day ) vulnerability – CVE-2016-6662
On Sep 12th, Dawid Golunski announced CVE-2016-6662 aka MySQL Remote Root Code Execution / Privilege Escalation (0 day) vulnerability. CVE-2016-6662 is reported as a critical exploit which can allow local and remote attackers to execute arbitrary code with root...
How to fix ‘Unknown table engine ‘innodb” error
InnoDB is a storage engine for MySQL. Due to its speedy crash recovery, InnoDB is the preferred engine for high available databases. But there are times when InnoDB throws error, such as 'Unknown table engine 'innodb''. Today, we'll see when and why this error...
‘550-Unrouteable address’ – What causes it and how to fix it in Exim, cPanel and Outlook
550 email errors happens due to a multitude of reasons, ranging from a non-existing mail account to a wrongly added mail server rule. Today, we'll discuss the error '550-Unrouteable address' based on the various scenarios we've noticed them happening, during our Web...
‘550 5.1.1 User unknown’ – How to fix this email error in Exchange, Postfix and Qmail servers
'550 5.1.1 User unknown' is one of the common issues reported by users sending mails to Exchange servers. 550 error means there is some problem with the recipient server which makes it unable to deliver the mail. In our role as Website Support specialists for web...
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