What is the root cause of mass email failure? The email check was not done correctly!

Many teams are working on Email When sending in bulk, you will encounter similar problems: high bounce rate, low open rate, system being blocked, and even increased customer complaints. Obviously the content is fine and the server is stable, but the results are a mess.

The problem often lies in one link——Mailbox testing is done incorrectly or not at all.

Email Mass messaging is not simple"Sending" is a process of strict screening and control of the quality of the list. Especially in the global cross-border scenario, if you do not conduct accurate email detection, it is equivalent to blind advertising, and the consequences are likely to be "blocking the domain and blocking the IP + zero conversion".

1. Five major consequences of not checking your email address

Bounce rate surges, lowering sending reputation

By default, most email systems set the bounce rate to be higher than5% of the accounts are listed as "low-trust senders". If they are not processed for a long time, the blocking mechanism will be triggered, causing subsequent emails to enter the trash can or completely fail to be delivered.

Affects the email reachability rate of the entire domain name

It’s not just a failure of one letter. The entire domain name isGmail, Outlook and other email service providers will be marked as "unsafe sources" and may fail even if sent to old customers in the future.

Distortion of delivery data and misjudgment of market effects

The more invalid emails there are, the open rate and click-through rate will be severely reduced. Even if users are interested, it is difficult to be effectively identified, and marketing analysis will deviate from reality.

Consumes a lot of system resources and email quota

mostSMTP services and mass messaging systems are billed based on volume. The waste of resources caused by invalid addresses directly translates into real cost waste.

Increased risk of customer complaints and blacklisting

Once emails frequently bounce back, are intercepted, and trigger the spam mechanism, they may also be reported and included in the international blacklist database, causing long-term damage to the brand.

2. Bulk sending systemMisunderstandings about "Detection Function"

Many companies think: I am using a well-known mass mailing platform, and the system should automatically filter out problematic mailboxes.

In fact, most mass messaging platforms onlyThere are two levels of control: "format checking" and "marking after delivery failure". They do not do this proactively:

lreal timeSMTP connection test

lSuspicious email alert

lMulti-country suffix parsing and behavioral scoring

lRejection rule judgment or risk level label

In other words, if you import a batch of email addresses with extremely poor quality, the platform will not judge for you whether they should be eliminated. This is why many accounts areThe "first group message" was blocked.

three,EmailCorrect detection posture before mass sending

Don’t wait for delivery failure to deal with mailbox problems. You should detect, classify and filter in advance to lay a solid foundation.

The specific process is as follows:

Step One: Format Compliance Detection

Check whether it is a legal email format and remove spaces, misspellings, and illegal symbols.

like:info@@gmail, user@gmailcom, blank line.

Step two:SMTP level authentication

Simulate sending a message and connecting to the mailbox server to determine whether the address actually exists and whether it can accept mail.

The return code is like250 means reachable, 550 means invalid, and 421 may be graylist delay.

Step Three: High-Risk Tag Identification

Identify and tag the following types of email addresses:

lTemporary email platform generation (such asyopmail, mailnesia)

lBlock unknown senders settings

lThe domain name subordinate has been banned

lHas been reported multiple times by users

Step 4: Status scoring and hierarchical management

Generate a rating or suggestion label for each email:

lCan be sent

lIt is recommended to verify again

lForbidden to send

Connect to the email system through group export to achieve strategic sending.

4. Standards for Correct Use of Email Detection Platform

Not every platform can do itThe "Global Mailbox Detection" task, especially when faced with complex cross-country and cross-language mailbox structures, requires the following capabilities:

lCompatible with multi-national email suffixes (.de, .fr, .co.uk, .com.br)

lSupport batch import and export (100,000+)

lreal timeSMTP probe and behavior scoring

lGenerate structured status reports to facilitate system docking

lOutput the recommendation level for the marketing team to choose delivery priority

On top of these standards, there must also be a stable, compliant, and secure data processing process to avoid being identified as abnormal access during the detection process.

5. It is recommended to use the Digital Planet mailbox detection system

As a platform focusing on global marketing data services,digital planetThe mailbox detection system provided is highly adaptable to mass sending scenarios:

lImport email lists with one click and automatically complete multi-dimensional detection

lReal-time detection of whether the mailbox exists, whether it is reachable, and whether it is prone to bounce

lGlobal coverageMainstream email formats and server behavior rules in more than 100 countries/regions

lOutput structured detection reports, fields can be customized and exported

lSupport dockingSMTP system, CRM, advertising audience platform

In actual delivery cases, many teams have reduced the bounce rate from the original rate after using digital planet detection.20% dropped to less than 2%, the email open rate increased by more than 3 times, and the delivery cost dropped significantly.

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