Symptoms

Plesk server has IPv6 address. When an email message is sent from the server to a Gmail account it fails to deliver.

In /usr/local/psa/var/log/maillog on Linux or in C:\Program Files (x86)\Parallels\Plesk\Mail Servers\Mail Enable\Logging\SMTP\SMTP-Debug.log on Windows the following error appears:

ipv6_failed_after_I_sent_the_message./Remote_host_said:_550-5.7.1_[ipv6______16]_Our_system_has_detected_that_this/550-5.7.1_message_does_not_meet_IPv6_sending_guidelines_regarding_PTR_records/550-5.7.1_and_authentication._Please_review/550-5.7.1_https://support.google.com/mail/?p=ipv6_authentication_error_for_more/550_5.7.1_information._hg7si388602wjb.61_-_gsmtp/

If you have seen before annoying pop-up banners appearing in the right bottom side of your side, maybe you are victim of notifications of your browser. So, if you want to disable them it is quite easy, just open in your brower (chrome) and type the following url

chrome://settings/content/notifications

You will see allowed sites notifications and blocked sites. 

Just disable the sites you want to block 

You may ask how Google is offering its searchers more power to revise and personalize their search results.

But what is going on here and what does this mean in terms of online strategy?

Google has made it easier for the consumers to slice and dice their search results.  Clearly this feature makes it easier for the average searcher to create more powerful searches. For the business owner, this is one more step in a Google trend: the overall power of a traditional top 10 organic listing continues to be diluted.

First the top 10 organic was diluted by PPC, which put 3 results above it.

1. Download the necessary archive and unpack it:

# wget http://downloads3.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.zip

# unzip ioncube_loaders_lin_x86-64.zip

2. Find the extension directory:

# php -i | grep extension_dir

extension_dir => /usr/lib/php/20151012 => /usr/lib/php/20151012