Gmail blocking servers that don’t have a Valid IPv6 PTR Record


Gmail-block-ipv6I wanted to share an issue we’ve seen multiple reports of this week, where MDaemon customers have started receiving bouncebacks from Google mail servers.

Valid email is being refused due to PTR record failures, and it’s happening for all Gmail domains including customer registered domains that are used with Google services.
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Zen Software's LinkedIn page

I recently ran a survey among our partner program members (all IT support companies) to find out which, if any, of the various social channels they use ‘frequently’, to help us understand how best to keep in touch.

Of the 324 respondents the results were as follows:-

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Problems synchronising your Nexus 5 via ActiveSync?

UPDATE: 10/12/13 Google released Android 4.4.2 today and I can confirm that this now fixes the Exchange sync issue on my Nexus 5. See below for more details…

A couple of us in the office have just taken delivery of some shiny new Nexus 5’s – fantastic devices we’re really happy with but we’ve unfortunately both come across what looks to be a known issue setting up the ActiveSync connection to synchronise them with MDaemon Messaging Server.

MDaemon has an integrated ActiveSync server but this issue with the devices will also apply to those of you who use Microsoft Exchange.

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Turning WorldClient into an application using Chrome

Worldclient as a Chrome appOne of the nice things about using a different browser to Internet Explorer, are the hidden functions that you find are added to make them stand out from the crowd.

Google Chrome has long been my favourite browser for many different reasons but it was only recently that I came across a very useful built-in feature that can turn any web page into an application shortcut.

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Getting the most out of our blog

If you’re anything like me, you probably don’t have enough time in the day to be checking all of the industry blogs you really should if you want to keep properly up to speed.

Ours is a great way to locate news on releases, technical tips and marketing support among other things, but like all the others, it does require checking frequently in order that you don’t miss anything.

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Is your email server online and operational? Use MXWatch to monitor it 24/7

If you use our email server software, MDaemon Messaging Server, and you’ve ever called our support team with issues relating to being unable to send emails, you may have noticed that we often perform a spam blacklist check.

To perform these checks we use just one of a range of useful tools over at the mxtoolbox.com website. We’ve been using this site for several years as in addition to the blacklist checking you can also do things like query a domain’s Mail DNS and SPF records, check whether the SMTP port is answering and even obtain an explanation of message header information. An essential tool to add to your favorites if you are a mail administrator!

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Are your files too big to send via email? Three possible alternatives…

It’s generally accepted that a message size of around 20MB is too large to send via email, and you’ll find in lots of cases that mail servers will actually refuse to accept files that are this big.

There are, however, many servers that don’t limit the message size, which means if you try and share that high-quality 150MB video of your cat performing Dancing Queen, both your network and the recipient’s will work overtime trying to deal with it.

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