The From Line

Sending, Managing & Monetizing Email

Yahoo Mail Servers Experiencing MTA Connectivity Issues Today 01/26/2010

This was posted today...

tech.groups.yahoo.com/group/ymailadmin/message/17

If you're seeing some queuing in your outbounds today when sending to Y! users, we're currently experiencing low connectivity across our MTAs, which started this morning. We're working to get things back to normal.  The SMTP error message being generated by the issue should be:  "420 Resources unavailable temporarily. Please try later hostname>" Our apologies for the inconvenience.

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Q&A: Feedback Loops and Spam Filters

We recently hosted a Q&A webinar to give our clients more information about feedback loops and spam filters — two major factors that determine the deliverability of your email campaigns. In case you missed it, here are the most common answers to your feedback and spam questions.

What is a feedback loop?
According to Wikipedia, a feedback loop is “the casual path that leads from the initial generation of the feedback signal to the subsequent modification of the event.” OK, but what does that really mean, especially in terms of email?

  1. Let’s trace the flow of feedback for an email. Let’s say…
  2. You send an email to Michael at This email address is being protected from spambots. You need JavaScript enabled to view it., inviting him to complete a survey in order to receive a free iPhone.
  3. Michael’s having a really bad day. He’s cranky. Plus, he already has an iPhone. So he clicks on that oh-so-powerful button “MARK AS spam,” rather than scrolling down to the bottom of the message to simply opt-out. This marks the initial generation of the feedback.
  4. That feedback is then sent to Yahoo as a complaint, which gets marked against your reputation.  Because you are signed up with Gold Lasso to receive these complaints, a message is then sent back to us, parsed and placed in to your account.
  5. Now for the “closing the loop” part. If nothing is done — that is, you don’t check the feedback loop — technically speaking the process has not been completed. Therefore, it’s important to finish the loop by responding back to Yahoo with the proper information to back up the fact that the recipient opted in, and to mark the user as opt-out in eLoop ASAP.


Why should I use feedback loops?
The better question is why shouldn’t you? It’s really a no brainer. Without this mechanism in your email marketing plan, it leaves you wide open to poor deliverability and ultimately a notch on your reputation.  

How should I use feedback loops?
You should use them as a means for opting out people who have complained, which ultimately will help improve your deliverability and reputation.

Where can I find them in eLoop?
The feedback loops (FPLs) are under the Reporting module, under Deliverability.

How often should I check them?
Every day, ideally. If you’re sending daily campaigns then you should be checking it every day before you send out your campaigns. You should definitely check them before every campaign goes out to limit the possibility of sending to someone who complained about your last campaign.

What should I do if I get a complaint?

There are three possibilities:

  1. First, you can do nothing. Obviously, we don’t recommend this, but it seems to be the most popular of the three choices.
  2. You can use your opt-in information and good personality to respond back to the ISP and, with the proper fodder, hopefully have the complaint rescinded.
  3. Lastly, you can simply mark the individual as opt-out in eLoop.
  4. The best solution is a combination of option 2 and 3. We always hope that the client has the proper opt-in information to back up any complaint, but we know that’s not always the case. At the very least you should be marking the users as opt-out ASAP.

Why is there a $200 setup fee for only the Yahoo Feedback Loop?
The short answer is that Yahoo made the signup process more difficult and lengthy than the others.
Most feedback loops allow us to send a bulk list of IP addresses through a basic online form. Yahoo, however, has a more detailed procedure that takes one of our staff members time to complete for each individual domain name. We’ll continue to offer new feedback loops that we can bulk submit free of charge to our clients as they become available.

Spam Filtering

What is a spam filter?
A spam filter is mechanism (it could be software, hardware or a combination of both) used to determine if a message is “clean” or not, and allows or blocks messages based on these rules before it hits your inbox.  

How do these filters work?
The process works by assigning a score to an incoming message. That score determines if the message is clean or spam. Companies have invested hours and hours into monitoring messages and coming up with algorithms to determine what is and what is not spam.  Some spam filters are simple, like the Junk Mail feature in Outlook which filters mail as it comes to your inbox. This is usually managed by the individual who can white list, block, release, and monitor the messages that have been filtered right from their PC or MAC. There are also server-level filters like Symantec’s BrightMail, which filters the mail at the server level before sending it to the recipient’s inbox. This process usually involves the IT staff in some fashion and is a little bit tougher to manage from the recipient level. Also, this process leaves the recipient at the mercy of the IT staff, who can make a change to the sensitivity of the filter that might affect deliverability to the recipient’s inbox. In this case, if the recipient has trouble receiving your message they may either never know or have to go through a lengthy process to have the IT staff resolve the issue. And that will probably damage your deliverability.  There are also outsourced solutions like POSTINI, which filter messages before they even reach your corporate mail server.

How are spam filters used/implemented?
There are various ways to use a spam filter, although most of the process is pretty automatic. The process is based on preset (and constantly managed, monitored and tweaked) settings either at the client, server or outsourced level. These presets determine whether a message is spam or not.  As noted previously, the implementation can be done on three levels, outsourced, server/appliance or at the client level. All of these need some kind of monitoring and tweaking to be successful.

How can it affect my email deliverability?
If there are enough complaints or your messages meet the criteria of being spam, then ultimately the filters can mark you as a “spammer” and cease to deliver your messages. The big problem with this, of course, is that your marketing success will suffer. If your messages are being caught in the filters (which in most cases you aren’t going to know unless your recipients are calling you and telling you that they aren’t receiving your weekly newsletter anymore) then they are not reaching the recipient’s inbox. And if your recipients aren’t getting your message, they probably aren’t interacting with you. Meanwhile your deliverability looks fine on the reporting side because they aren’t bouncing back. We offer enhanced message testing through Pivotal Veracity, which can help determine or troubleshoot any problems with deliverability. This is available in your eLoop account under Outbound Messaging. What is the delivery process of an email from eLoop to the recipient’s inbox?

Once the campaign has been executed from eLoop:

  1. The message is compiled on our end between our database and web servers. This process consists of modifying the links to be trackable, inserting Dynamic Content, compiling the list, comparing statuses, etc.
  2. The messages are then sent immediately to one of our mail servers to be delivered.
  3. The mail server will immediately try to send the message to the recipient’s mail server by looking up the appropriate records.
  4. If the mail server is up and accepting messages, then the message will be delivered and the process ends.
  5. If the mail server is not up and not accepting the message (for one reason or another) then the message will be sent back to our server to try again later. At this point our mail server has to determine what kind of bounce this is, and that will determine the next action. If the message is a hard bounce then the message process ends and the message is bounced back to the client’s eLoop mailbox, parsed and applied as a bounce in the eLoop system. If the message is a soft bounce, then based on settings of our servers the message will be retried x amount of times before determining if the message can be delivered or bounced back. Keep in mind: Just because the message has been delivered to the recipient’s mail server does not mean that the message has reached your recipient’s inbox. According to our mail server the message was accepted by the recipient’s mail server, which does constitute as a “delivered” message. This is where the filters come in to play.

Also note: Be sure to check your bounce reasons. This can give you a good indication why messages are being bounced back along with an action to apply to help with future deliverability. We can’t stress enough how important it is to monitor this information using the tools that we provide and test.

What does it mean to be blacklisted? What does it mean to be flagged or labeled as spam?

These two questions have a lot of synergy. Being blocked for spam is also considered being blacklisted, but it’s usually at the ISP level and then filtered down to the recipients depending on the ISP. For example, MSN or Road Runner (both of which you can check under Feedback Loops in eLoop) may block you from sending to their recipients based on a high level of suspicious mail coming from your IP address.

First, a little bit of backgrounds on blacklists. The term “blacklisting” refers to someone being prevented from access to something based on the judgments of others. In the case of email, it refers to your IP or Domain being blocked by one of the many blacklists being utilized on the Internet. This could be a permanent block or a temporary block depending on the severity of the infraction and or the frequency of the infraction. The eLoop Blacklist Check located on the main login screen uses many of the most well known blacklists to determine if your IP is blocked or not. Some companies have independent internal blacklists that they manage and monitor themselves. Other organizations subscribe to one of the many blacklists that are run by various organizations on the Internet. Some of these organizations are friendly and understand how to work with you. But others have a zero-tolerance policy for spam and are EXTREMELY difficult to deal with.  

As we have stated before with feedback loops it is so important to retain any and all opt-in information. This is vital to being removed from blacklists.  

What can I do to better manage my deliverability and sender reputation?

  1. Create an abuse@ sender profile in eLoop. Here’s how:  Under Account Settings/Reply Profile Settings, you can add a new email address. Simply     create a new profile for This email address is being protected from spambots. You need JavaScript enabled to view it.. The abuse@ email address is the default for spam complaints. Once you create this profile, please be sure to check it often. To check this account, login to Horde using the Webmail tab under Outbound Messaging, use your abuse@emailaddress and the password you chose when creating the profile.
  2. At the top of your emails, request that the recipient add the “from” email address to their safe sender list. For example: Please add “This email address is being protected from spambots. You need JavaScript enabled to view it.” to your address book or safe senders list to ensure our messages are delivered to your inbox.
  3. Keep clear and accessible records for opt-in information.
  4. Place terms and conditions for your spam policy on your Web site. To see an example, visit http://www.goldlasso.com/index.php/anti-spam-policy. As an ESP, our spam policy is a bit different, but the gist of it is there. If you’d like assistance creating one, please contact your account manager.
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What’s Email Throttling — and Why Do You Need It?

What is email throttling?
Throttling is the ability to control your campaign sending at a more granular level by limiting the number of messages sent to a recipient’s mail server based on time intervals. In other words, the throttling process slows down an email on your server or through your service provider over the course of several hours.

What are the benefits?
Throttling typically results in improved deliverability and fewer bounces. But its success depends on a number of factors. There’s no magic formula for when to throttle, how many to throttle, or who to throttle to. It’s a constant process of tweaking, testing and analyzing data — but the effort should be rewarded with a concise set of metrics and analytics to work with. After a few campaigns, you should begin to see what times of the day are more successful for your transmissions as well as which recipients have improved deliverability. Keep in mind that all of this depends on the cleanliness of your lists, the content of your messages and your sending reputation.

How does throttling work?

Gold Lasso uses two kinds of throttling — at both the hardware and software level — for even greater control. At the hardware (Mail Server) level we use settings that have been researched and tested based on how ISPs are configuring their mail servers to throttle. By the same token, the recipient mail servers are configured with a threshold as to how many concurrent connections as well as how many transmissions per connection they will allow. If you exceed these levels, your messages can be throttled back to the originating (sending) mail server with the possibility of deferment or bouncing of the messages. If the messages are throttled properly from the onset, however, you limit your risk of this happening.  

How do I plan my throttled campaign?

Planning is essential to a successful campaign. Your campaigns should be set up to go out over a specified time (e.g., 10,000 messages per hour over a 10-hour period). You don’t want to spread your campaigns too thin so that they run in to one another. And you may not want your campaigns to go out all night long either. Here’s a good rule of thumb: divide your campaign into 10 equal parts over 10 hours. If your lists are smaller you could send every 30 minutes over a five-hour period. And if timing’s not a priority for you, you could “trickle out” your emails over several days.

Who should use this feature?
Everyone should use it to some degree, especially if you have a large number of emails that are going to the same domain (e.g., 20,000 @yahoo.com addresses.)  Because Gold Lasso uses both hardware- and software-level throttling, all of our clients get the benefit of hours of research and tweaking on the hardware side. And even though Gold Lasso is automatically throttling on the hardware side, it’s a good idea to throttle at the software level as well for even better results. Even if you’re only sending out 1,000 emails in your campaign you may see improved deliverability.  The only exception to this rule is if your lists are extremely clean. But even with an extremely clean list, you may get even better results by throttling. It’s definitely worth a shot!

For more information on throttled campaigns, please contact your designated eLoop Account Manager.

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Yahoo! Resurrects Sender Score Certified / Bonded Sender

Earlier this year it was announced that Yahoo! would be joining Sender Score Certified. Well the time has arrived!

During the first week of January 2009, Yahoo! will begin using Sender Score Certified status in their filtering decisions. This means that Sender Score Certified members will receive preferential treatment in reaching the inbox at Yahoo! Mail. This new benefit comes in addition to the long standing benefits at Hotmail, Cloudmark, IronPort, Road Runner, Cox, SpamAssassin, Barracuda, and dozens of other email networks worldwide. This is extremely exciting news for all Sender Score Certified members and folks that had forgotten it existed.  This has potential to be a weapon in your deliverability arsenal that could increase your email program's ROI almost overnight. 

Details on how this data will be used will be sent to Sender Score Certified members very soon.  In my opinion, I have seen little value in this service for the past couple of years for the individual however this announcement could mean a new dawn for a rebranded and repurposed "Bonded Sender" program.

If you are not currently a Sender Score Certified member now is a great time to apply .  It does cost a small licensing fee from Return Path to be SenderScore certified however at the end of the day, if delivery to the Yahoo! inbox is important to your program, it is strongly advised that you at least apply to see if you qualify for the program.

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Audit your Email Campaigns - 5 Things to Consider

If it’s been more than a year since you took a good, hard look at your email template, metrics, reports or design close the door, shut off the phone and schedule a check up.  Too often marketers spend time and resources setting up their e-mail marketing programs and forget that they need a little TLC (testing, list management, and cleansing) to function properly. 

Here are five things to include in your check up.  

  1. Cleanse the code – review and clean-up the HTML code in your message template. This is especially important if more than one person uses the account. Small changes can flag spam filters and cause formatting issues that discourage recipients from opening it.  
  2. Remove inactive contacts – keep distribution lists clean and manageable by analyzing and possibly removing inactive contacts. Try to find out why they’re not reading your message and brainstorm ways to grab their attention.
  3. Test the opt-in process – do all the links work and take the intended reader to the right place? If it takes the reader too many clicks to sign up or they end up in the wrong place they’re likely to walk away completely.  
  4. Test platforms and email clients – what does the message look like in AOL, Gmail and Yahoo? Does it make it through to mobile devices such as Treos and Blackberries? Don’t rely only on the computers in your office, move testing to off-site computers and servers also. 
  5. Provide a little human touch – if you’re using your ESP correctly all process should be automated, but that doesn’t mean mistakes aren’t made. Assign a staff member to check all mailboxes to ensure that any messages or responses are handled in a timely fashion. 
  6.  Above all…don’t forget the metrics. eLoop has extensive reporting capabilities that help you gauge the success of the campaign. Don’t forget to incorporate them into the email marketing process. 
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