Bounce codes are often a lie. Do not believe them per se. This has to do with anti-spam methods.

Actually: Gmail is quite the odd one out. They have their own opinion on how to filter, and quite succesful at it. Hotmail and Yahoo both offer feedbackloop and, sometimes, you can contact them.

Now the anti-spam organisations sure know each other, and share data. But on a larger scale that you would probably see in blacklists (for a full list of blacklists: http://multirbl.valli.org/). Since you are not blacklisted, I don't think that that is the issue.

About the messages: Hotmail says you should try again later. Do that. But Yahoo says that there are user complaints... That is probably true. You may actually be sending too little email (that looks like a botnet-like signature). They want a lot of legitimate traffic per IP, not droplets of maybe-spam.

But to conclude: Email is not easy anymore, even if it is your profession (it is mine). Forget about getting to know what is behind the curtains of blacklists and large inbox providers (they have their hands full on real crime to worry about a few false positives).

There are enough arguments against that conclusion. Just think of all the lost opportunities for businesses and wasting dollars on crap software, with previous MS business methods.To describe this differently: The MS way, is a dead end and you need extra effort to get on the highway again.

The poison pill: You need their runtime which can only be used by their rules.

You succeeded in posting, nice job.

Browsing and mail seems to work. RLY.

I thought that all you need is BOFH.

They want low costs period. However, I would expect them to take extra fuel with them to compensate for the eventuality that you would have to fly around the cloud itself (but only in condition orange, for example).

You can workaround this with procedures. Iceland could provide a radiostation which you must monitor being in the area near the vulcano. The radiostation could periodically/automatically say that everything is OK or that it is not. Obligatory notifications that you are entering and leaving the area are often used.

And he is not the only one. When looking for the same question on the internet, this popped up. Sometimes you DO NOT have to ask slashdot for good recommendations.

That is because they can't manage it properly. Only to be replaced by a problem that needs to be managed even better.

Spamfiltering is a little bit more sophisticated than greylisting. My mailservers speak SMTP perfectly, it does not validate my content automatically around the world.

And how do presume the spamfilter will work with all the content being encrypted? This is not well thought out.

Are people mindless?

Any degree of privacy-requirement is enough for me to start using encryption.