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Happy Turkey Day! In recognition of Thanksgiving our Support office will be closed Thursday (11/23). We will be open Friday (11/24) for limited hours (10:00am - 6pm ET) and will be back to normal hours on Monday (11/27).
Here at Constant Contact, we are an industry leader in email delivery. This is no accident. Our Terms and Conditions are designed to ensure the best possible delivery rate for all of our customers.
That being said, it’s expected (read: absolutely normal) that most email campaigns will have some level of bounces. Knowing the cause and reasons behind these bounces can help you as a marketer to ensure you are mailing to the cleanest, most engaged list that you can. First, I covered Non-Existent and Suspended bounces, then Undeliverable and Blocked bounces; today I will be going over the remaining categories: Mailbox Full, Vacation/Auto-Reply, and Other.
What Is A Mailbox Full Bounce?
When an inbox reaches it’s maximum allowed storage, it will reject the message and bounce it back to Constant Contact as “Mailbox Full.”
If The Recipient Frees Up Space In Their Inbox, Will They Start Getting Mail Again?
Yes; however, I recommend removing these contacts. Here’s why- most ISPs (Internet Service Providers) provide more than enough inbox space for the average user. If someone’s inbox is so full that they can not accept mail, chances are they are not actively checking their mail and therefore are not an engaged contact.
What’s The Deal With The Vacation/Auto-Reply Bounces? When I Set An Auto-Reply, The Mail Waits For Me In My Inbox.
You’re right! This is the exception to the rest of the bounce rules. Messages that show in this category are delivered to the contact, no action on your part is necessary. We include these with the bounces to let you know that you may not see an open/response/click from this customer for a while.
Note: While most of these responses get sent to the actual sender (Constant Contact), some can be sent to the email address you selected as the “from” address for your campaign
What Is The “Other” Bounce Category?
As stated in a previous post, we sort our bounces based on information that the ISPs provide us. If the information they send back isn’t clear, it may get sorted into the “Other” category.
Should I Remove My “Other” Bounces?
That is a tough call. I recommend obtaining a secondary email address for the contact if possible. If the address continually bounces and you are confident that it is a valid contact, then please reach out to our Account Review team at 866-433-8499.
Where Can I Find These Bounces?
If you look at the reporting for a specific campaign, click on the number of bounces you have. Then select your choice from the “Display” drop down.
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Here at Constant Contact, we are an industry leader in email delivery. This is no accident. All of our Terms and Conditions are designed to ensure the best possible delivery rate. That being said, it’s expected that most email campaigns will have some level of bounces. Knowing the cause and reasons behind these bounces can help you as a marketer to ensure you are mailing to the cleanest, most engaged list that you can. Last month, I spoke about Non-Existent and Suspended Bounces, in this post I will be detailing Undeliverable and Blocked bounce types.
What Are Undeliverable Bounces?
When Constant Contact sends an email to a recipient, but the receiving server can not be found or connected to, the email will bounce as Undeliverable.
For Example: If someone were to send an email to my address, let's say it's email@example.com m; however, at that time the receiving server, in this case it would be example.com , is not responding. The email will bounce as Undeliverable as a result (usually after multiple automated resend attempts).
Isn’t That The Same As A Non-Existent Bounce?
Not at all!
A Non-Existent bounce occurs when we connect to the receiving server, but they can not find the address we are trying to send to.
With Undeliverable bounces, that initial connection can’t even be made.
What Are Blocked Bounces?
In the never-ending battle against spam, ISPs do what they can to stay ahead of the curb. Most often, this involves the use of email filters or blocklists to keep there subscribers’ inboxes clean. Sometimes those filters and blocklists end up preventing Constant Contact’s mail from getting to the intended recipient, resulting in a Blocked bounce.
Does A Blocked Bounce Mean That Constant Contact Is Blocked?
Not necessarily, While it’s true that Constant Contact (like all ESPs) may occasionally experience blocking issues at a particular domain/filter/blocklist, most often Blocked bounces occur on a smaller scale. These bounces can occur due to content in the email that a spam filter deems problematic, such as an image, email address, or website. Some ISPs even have rules based around how much mail they accept at a time from any one source, or even block email from bulk senders altogether.
Where Can I Find My Undeliverable and Blocked Bounces?
If you look at the reporting for a specific campaign, click on the number of bounces you have. Then select “Undeliverable” or “Blocked” from the “Display” drop down.
What Should I Do With Undeliverable and Blocked Bounces?
In the case of Undeliverable bounces, it’s acceptable to try sending to the addresses again after a few hours, just in case it is a temporary issue. If they continually bounce, then we recommend moving them to unsubscribe.
Blocked bounces sometimes take a bit of work to diagnose. First, check the “Email Delivery” row at https://status.constantcontact.com to see if there are any known issues. If that doesn’t help, then please reach out to our Account Review team at 866-433-8499.
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Here at Constant Contact, we are an industry leader in email delivery. This is no accident. All of our Terms and Conditions are designed to ensure the best possible delivery rate. That being said, it’s expected that most email campaigns will have some level of bounces. Knowing the cause and reasons behind these bounces can help you as a marketer ensure you are mailing to the most current, engaged list that you can. Over the next few months, I will be writing about Constant Contact’s various bounce categories to (hopefully) clear up any questions you may have. In this post, I will be focusing on Non-Existent and Suspended Bounces.
What Are Non-Existent Bounces?
When Constant Contact tries to send an email to an address, it can bounce as Non-Existent if the receiving server tells us that the address in question does not exist.
For Example: Say I have the address “firstname.lastname@example.org”, but I create a new email address and shut down this one. A few months later, if someone tries to send an email to my old address, “example.com” is going to send a message back to the sending server indicating that “email@example.com” is no longer in existence.
What does Constant Contact do with email addresses that consistently bounce as Non-Existent? We “suspend” them.
What Are Suspended Bounces?
Put simply, they are email addresses that have continually bounced as Non-Existent.
Put not so simply, they are not true bounces. They are email addresses that have been placed on a global suppression list of addresses Constant Contact does not send to.
Allow me to explain. When an email bounces as Non-Existent, it is placed on a 15 day hold. During this time, no mail will go to the address in question from any Constant Contact account. After that 15 day period, mail will resume going to the address. If the address continues to bounce as Non-Existent, it will be added to Constant Contact’s global suppression list and show as a Suspended bounce within a bounce report.
Why Does Constant Contact Care About Bounces? (And Why Should You?)
Constant Contact is a “shared IP environment”, meaning that we have a number of IP addresses through which all customers send their mail. To ensure email delivery, we need to take measures to help the reputation of these IP addresses, otherwise ISPs and domains may decide to not accept our mail. Continually mailing to email addresses that bounce as non-existent is frowned upon in the industry and could impact Constant Contact’s ability to deliver your mail to the inbox.
You can help by managing your Non-Existent bounces after each campaign.
How Can I See My Non-Existent and Suspended Bounces?
If you look at the reporting for a specific campaign, click on the number of bounces you have. Then select “Non-Existent” or “Suspended” from the “Display” drop down.
What Should I Do If I Think A Non-Existent (or Suspended Bounce) Is Valid?
Here are a couple of reasons why a valid email address could be bouncing as Non-Existent:
There Is A Typo - Lets face it, nobody is perfect, and most people’s handwriting is certainly less than perfect. Typos happen, and often they can lead to bounced email addresses.
Bounce Coding - We classify bounces based on the information given to us by the receiving server. If the message received is too vague, or points to a Non-Existent bounce when it truly is not, then it could be erroneously categorized.
If you come across a Suspended bounce that you think is valid, please contact the Account Review Team at: 866-433-8499
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