All About Email

How To Stop Unwanted Emails From Reaching Your Inbox

Thursday, July 29th, 2010

OnlyMyEmail blocks over 99% of unwanted email without critical false positives. Stop wasting your time and sign up for a spam free inbox.There are really only two ways to keep spam out of your in-box:

  1. Prevention — This is at best only partially effective and requires a fresh and un-spammed email address. However, if you do start with a new address prevention can seem downright miraculous.
  2. Filtering — Also not perfect but a good spam filtering service should remove more then 99% of the messages you don’t want. The thing to watch out for in filtering is false positives. (False positives are messages that should have been delivered but were blocked instead.) Blocking spam is easy, the hard part is not blocking the good messages.

(Actually, there is a third way but we’re assuming you don’t want to give up email altogether.)

These approaches are not mutually exclusive. In fact the most effective spam filtering comes from a combination of both. This means that, even if you have a good spam filtering service, it still helps if you take preventative measures. Relying on your filtering service to take care of everything is like asking asking your doctor to keep you healthy when you have a lousy diet and fail to exercise.

Don’t Encourage Them

First and foremost, spam exists because it works. If a spammer sends out millions of emails enough people will respond to make it worthwhile. Don’t be one of them.

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Currently not permitted to relay through this server – Worst Rejection Ever!

Wednesday, July 28th, 2010

Of all the confusing and convoluted mail server rejections commonly in use, “Currently not permitted to relay through this server” causes more Support tickets for us than any other.  Worse yet, it’s not even an error that we use, so we find ourselves constantly trying to coherently explain what someone else’s mail server is saying.

Given that this is arguably the worst mail server error message ever, we’re going to try to make sense of it once and for all.

When reviewing the following example, realize that the IP addresses and server names will change to reflect the server that is sending the email and also the one which is refusing to accept it. We’re replacing the receiving/rejecting server IP with 111.111.111.111 and the sending server’s IP with 222.222.222.222.

Also note that the layout and formatting for these rejections can often be confusing as well, with lots of line breaks and “550′s” scattered about.

Disclaimers aside, this ugly bounce/rejection/NDR message typically says:

SMTP error from remote mail server after RCPT TO:: host 111.111.111.111:
your-mailserver.com [222.222.222.222]: is currently not permitted to relay through this server.
Perhaps you have not logged into the pop/imap server in the last 30 minutes or do not have SMTP Authentication turned on in your email client.

While the language is fairly uncomplicated, at the same time it’s also impossibly confusing for the average user to decipher. Further, because of the dual nature of this error message, it actually confuses many experienced email and network admins too.

What on earth does this mean?

While the “currently not permitted to relay through this server” is a convoluted explanation, what it means is that the receiving server doesn’t believe that it is supposed to accept messages for the recipient domain, so it’s refusing/rejecting the email you sent.

Instead, the recipient server thinks that you’re trying to use it to deliver/relay messages to some outside domain for which is not responsible.

Usually this is seen after someone manually changes settings on a mail server or some automatic update is applied and the server which used to happily accept mail for “recipient.com” no longer thinks it’s supposed to host mail for them and rejects with this error instead.

On the other hand….

On the other hand, these error messages also contemplate that perhaps you’re not some outside mail-server trying to deliver inbound mail, but instead you might be a local user with a mail account on the server who is trying to send outbound email via SMTP but you (or your email software) forgot to login and authenticate.

The fact of the matter is that most mail-servers cannot actually tell the difference between another mail-server connecting to deliver inbound mail or an individual user who is connecting to send outbound mail.  That may sound hard to believe, but it’s sadly true.

And that is why this part is confusingly tacked added to the end of the rejection:

Perhaps you have not logged into the pop/imap server in the last 30 minutes or do not have SMTP Authentication turned on in your email client.

Having this one rejection message trying to cover two completely different scenarios, combined with the most confusing of language, is what causes so many problems and misunderstanding.

Now, given that the above explanation still might not make perfect sense to the average user, let’s re-write the rejection to say what it really means:

We’re sorry, our server will not accept your message.

If you are a mail-server connecting to our system to deliver this message to us,  then please be aware that our servers are not configured to accept mail for the recipient’s domain.

If you are a local user, trying to send this email outbound for delivery, the problem is that we don’t see you as having logged into the SMTP server. Please configure your software to use SMTP Authentication and/or restart your email client software.

Granted this still probably won’t make perfect sense to someone with no knowledge of how email actually works, but it’s hopefully a lot clearer for the rest of us.

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Old Fashioned Advice For Avoiding Spam Email

Wednesday, July 14th, 2010

If you really want to avoid unwanted email you should use OnlyMyEmail. We block over 99% without critical false positives.If you don’t respect your online identity, nobody else will and before long your in-box will rot and fall off. At least that’s what our mother told us. She also told us to eat our vegetables that we’d go blind if we forwarded email to ourselves.

We usually take what Mom says with a grain of salt.

However, it is true that if you start with a clean (as in “never been used”) address you can keep your in-box mostly spam free for a long time using basic email address hygiene.

Disclaimer: The tips that follow do not help to avoid dictionary campaigns which is why we say mostly spam free. Choosing a longer and/or more obscure address can help with this and an occasional spam from a dictionary campaign is not a big problem as long as you don’t open it, don’t reply and delete it right away.

Prevent Email Spam

The best way to prevent email spam is to keep your email address out of the hands of spammers. In order to do this you have to take precautions to ensure both safe web surfing and safe emailing. We’re sure your mother already warned you about the ways of the Internet too, but in case she didn’t, this is probably what she would say.

1. Be Modest With Your Email Address

You may think it’s cool to bare your email address in public but it can only lead to trouble. The web is crawling with address collectors (also known as harvesters) that just want to get into your in-box. Given the chance they will grab your address and have their way with it.

Cover your email address in public by using obfuscation. Instead of showing off your entire address at social networking sites just hint at it like this:

  • myaddress AT mydomain DOT com

Anybody that’s worth knowing will understand and you won’t get anywhere near as much attention from undesirables.

If you have a web site of your own you should avoid exposing links to your email address. It is possible to have address links on your site but you have to be careful to hide them from address collectors using a tool like the OnlyMyEmail Encoder.

2. Giving It Away Is Asking For Spam

Promiscuity is dangerous. Everybody wants your email address and most of them have bad intentions. This includes banks, grocery stores, magazines, warranty cards, job applications and especially web sites. They may seem nice but you never know if they’ll spam you or who they’re going to sell the information to.

If you must give an email address to a web site of questionable repute you need protection. Use a disposable email address and cast it aside like a used condom when you’re done.

3. Practice Safe Surfing

Make sure you have up to date anti-virus software with you at all times. You never know when you might need protection. The Internet is full of nasty viruses and malware and current AV software is your best defense against STDs (Sneaky Trojan Downloads).

Lack of money is no excuse. Many anti-virus clinics will provide you with free prophylactic software. Here are a couple of our favorites:

Remember, safe surfing not only protects you, it protects your friends. One virus can infect everyone in your address book. Using prophylactic software also protects you from your friends. Do you really know how careful they are?

4. Be Discrete About Your Partners

If you do engage in email intercourse, don’t let the whole world know who you’ve been emailing with. Learn to use Blind Carbon Copy (Bcc) to make sure you don’t give away your friends’ addresses and encourage your friends to do the same for you.

Do you really want everyone you email with to know about everyone else you email with? Think of your reputation! You’ll feel better knowing that by using Bcc you’re maintaining your privacy and keeping your affairs to yourself.

5. Avoid Strangers With Cheap Pills

Strangers will try to get you to their web sites by enticing you with cheap ED pills, easy diets, cheap watches and porn. Once they get you there they’ll abuse your privacy at best and probably steal your money and infect you with STDs.

It’s much better to ignore offers from strangers entirely and not give them the chance to trick you. Never reply to spam emails and if you can, delete them without opening them.  If you do open them, never click on the links inside.

Your Email Address Is Precious

If you value your privacy you will heed the advice above. Take good care of your address and you will be able to enjoy it for a long time. On the other hand, if you lose your innocence you will never be able to get it back. Your address will become jaded and used; passed from spammer to spammer like a worn out penny. Just another victim of spam.

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What’s A Disposable Email Address?

Friday, July 9th, 2010

disposableIf you spend much time on the Internet you’ll notice that everybody wants your email address. The reasons they give for wanting it vary but they’ll generally come down to one of these:

  1. They use it to identify you — Email addresses are unique by definition and therefore make good user names.
  2. They want to keep you up to date — In other words they want to send you marketing messages.
  3. They allow others to contact you — This applies to sites that publish profiles like forums and social networking sites.
  4. They want to sell it — Bet you didn’t know your address was worth money.

Creating a unique user ID is a legitimate reason for wanting your email address but many organizations think “Heck, as long as we have this huge list of addresses we might as well sell them and make some extra cash.” The same goes for “keeping you up to date”.

Social networking sites are also likely to sell or lease them to outsiders or “Marketing Partners”. Especially if they don’t charge you for their service in the first place. They need to make money one way or another.

(more…)

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What’s An Email Address Collector?

Wednesday, July 7th, 2010

harvesterSpam is a volume business. The spammer that sends the most spam to the most addresses wins. Therefore, spammers need to continually find lots of new email addresses.

An email address collector (a.k.a. email address extractor, harvester or scraper) is a software tool used by spammers to crawl the web looking for email addresses.

How Does It Work?

Email address harvesters are more or less the same as the web crawlers used by search engines to index the web. Basically, crawler software starts with a given web page and visits every page linked from that page and every page linked from each of those pages and so on until it is stopped or it runs out of links.

In the case of a search engine crawler the software also records various pieces of data about each page such as word frequencies, what links it contains and how old it is. An address scraper is only interested in email addresses. It searches each page for character strings containing ‘@’ and ‘.’ (and if it’s really smart ‘at’ and ‘dot’). When it finds these two characters in the right order (and possibly other criteria are met) it saves them to the spammer’s database.

(more…)

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Dictionary Attack Spam

Monday, July 5th, 2010

dictionaryThe term “dictionary attack” usually refers to a method for finding a password by trying a limited (but still very large) set of passwords to see if any of them work.  In the spam lexicon it means doing the same thing with email addresses.

How do they do it?

Spammers generally don’t hand write spam messages (any that do are probably not very successful). They use computers. The software they use to  generate bulk e-mailings can also vary parts of the message and the most basic variable in a spam campaign  is the “To:” address.

Normally, the spammer will feed the software a list of addresses purchased from another spammer or accumulated by an address harvester. A dictionary attack uses all of the terms in a dictionary combined with a domain name (or several) to generate an address list.

Why use a dictionary?

By now you might be thinking “My email address is my name and my name’s not in the dictionary so I’m safe.”

Don’t bet on it.

(more…)

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What’s A Browser?

Friday, June 18th, 2010

Web browsers, or browsers for short, aren’t strictly an email related topic. However, the browser has become an important tool to most email users because of the proliferation of web-based (browser-based) email clients. Many email users have never used a stand-alone email client and have always processed their email using a browser-based client.

The best known browsers are:

You are almost certainly using at least one of these.

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What’s In A (Pretty) Name?

Saturday, May 29th, 2010

The answer to this question is: Not much really.

In email parlance, the “pretty name” is kind of a plain text hitchhiker that can (but is not required to) accompany an email address for display purposes. It allows email clients to display meaningful text for address fields (From, To, Cc, Bcc) instead of just an address.

So, instead of seeing something like this:

somecrypticaddress@somedomain.com

Your email client will show you something like this:

Name of Somebody I Know

A correctly formatted email address with a pretty name will look like this:

“A Pretty Name”<address@optionalsubdomain.domain.tld>

However, you will rarely, if ever, see an address displayed this way. Most email clients will just display the pretty name if one is available (BTW, this explains why you see addresses for some of the people in your address book and names for others.)

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How To Stop Downloading Duplicate Emails

Monday, March 15th, 2010

If your email software suddenly starts downloading duplicate copies of the same emails, there are four common causes to consider.

1. Your email software has more than one “Account” or “Profile” or “Personality” configured to download messages from the same email POP account.  As a result, your software downloads one copy for each Account/Profile/Personality.

  • Symptom: All email from all senders are downloaded two or more times; but only up to a certain number of copies, which remains the same… ie: two copies of every email or three copies of each.
  • Solution: Manually review each Account/Profile/Personality within your email software to make sure that the same POP account isn’t listed more than once.

(more…)

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Learn to use Bcc

Tuesday, February 23rd, 2010

private snafuOne of our staff recently received (on an unfiltered account) a forward of one of the many silly hoaxes that circulate periodically (“Pleeeease Reeead it was on Good Morning America”).

As he scrolled through the message, curious to find out exactly which silly hoax it was he became increasingly horrified at what he was seeing.

The message had been forwarded many times before reaching the person that forwarded it to him and each of the forwarders had openly published what appeared to be their entire address list.

This brings up two issues (only one of which will be addressed here): (more…)

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