Do away with the Invalid emails to prevent Temporary Blocking

Have you ever encountered a situation when your emails bounce with the error message “too many invalid email addresses? Well, such a situation arises due to temporary blocking. Although a temporary block is not the as serious issue as a permanent block at ISP, it is worth your attention.

When email marketers adopt risky list building tactics to reach out to more people quickly, they are likely to include invalid email addresses to their mailing list. But credible email marketers understand the importance of quality above quantity. That’s why they focus on building a genuine mailing list with interested people on it rather than crowding it with irrelevant people. Sometimes, even good email marketers who check their mailing list regularly, may not be able to deliver emails to specific ISP due to same issue.

If you follow poor email collecting tactics, you may not be able to deliver emails to all the subscribers and not just the new members. However, temporary email block at ISP is not of much concern. At best, it restricts you from sending emails to valid email addresses and determining the wrong email addresses until it is removed. At worst, it can subject your emails to more severe action and even permanent blocking in the future. Therefore, it is advisable to investigate the causes of temporary blocking, so that you can take the matter in your control and adjust your email marketing program to prevent ISP email blocking in the future.

Does Sending to Bad Email Addresses Affects the Deliverability?

Absolutely yes, sender reputation is considered as an important factor by most ISPs. Other factors include spam complaints and high bounce rate. Sender reputation determines the future of your emails. If your emails are prone to be delivered frequently on wrong email addresses, then it is likely to damage your reputation.

ISPs monitor bad email addresses in order to identify dishonest senders because it is a popular tactic among spammers to send emails to a huge email mailing list without actually confirming whether emails are valid or not.

When an ISP notice that a certain number of emails is sent to invalid addresses by the same sender, then it is likely to apply temporary block on such sender. This technique comes under ISP’s security measures. ISPs generally don’t reveal their threshold of blocking, in order to prevent its misuse by spammers to adjust their mailing list to avoid a block. The threshold for blocking also differs for different ISPs.

Do you feel you are a target for Temporary Blocking?

If you receive a message that your emails have bounced, what would you do? If your answer is something other than taking immediate action, then you are at risk of temporary blocking. In case, you receive any such error clean your mailing list immediately and remove all the bad email addresses. These measures will reduce the likelihood of facing a block and also improves your reputation as a sender.

Email marketers who are prone to temporary block at ISP due to invalid email addresses are:

>> Marketers who are in the habit of using poor email gathering techniques to develop their mailing list without taking care of quality.

>> Marketers who in attempt to re-engage their inactive user periodically send emails to an old mailing list.

>> Marketers who don’t follow effective or regular email list hygiene or who might have changed their service provider.

Make sure you keep mailing list clean from invalid addresses and you don’t fall in the list of marketers who face blocking too often.

Tactics to avoid temporary blocking for invalid email addresses:

You can reduce the likelihood of getting a block at ISP temporarily by following the mentioned tactics. Straightforward yet crucial, these tips also help in improving the overall email deliverability.

Set up a good email acquisition process: This is the point where you should begin. Stop following spammer’s tactics of harvesting or buying email lists, it is a sure way to get blocked. Create your mailing list with genuine and fair methods. Let your people subscribe themselves by putting a sign-up form on your website. It ensures that you get valid email addresses only from those people who are willing to receive your emails. Globally, email marketers prefer confirmed opt-in process for email collection to prevent bad and mistyped email addresses. If you use a single opt-in method, then you can add email confirmation field to sign-up form to identify and block misspelled email addresses.

Revise and verify the old lists periodically: If you have not used your mailing list for a considerable long duration, then it is suggested to check it for dead and invalid email addresses before you start sending emails to your users. It is a good idea to connect with your inactive users but in that process, make sure you don’t end up in damaging your reputation and deliverability.

Discard addresses responsible for bounced emails as soon as possible: Regularly check your mailbox for returned messages and if you see any message related to email bouncing, remove the invalid email addresses from a mailing list right after the first bounce only. You can set up a separate email account to receive returned messages to avoid mixing bounces with regular messages. Then, use this “return email address” in your email marketing campaigns. This method will ensure that you receive bounces in a separate mailbox that will help in taking timely action against bounces by eliminating invalid email addresses from your database.

The tactics we have discussed are bit sophisticated and demand steady and consistent work and patience. The whole process can consume a considerable amount of time that usually depends upon the length of your mailing list. However, everything begins with a sign-up process. If you rely on risky email collection tactics, you are most likely to waste your time and efforts in cleaning your mailing list from bad emails.


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