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MX Email Service
Troubleshooter

Diagnose email that is not going out by analyzing if it is listed in blacklists or has wrongly set MX/SPF/DKIM records.

A completely free service. Simply enter your domain name and we will analyze it.
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Things To Know for Email to Not Land in Spam

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MX Records

MX Records are DNS entries added to your domain that identify where to send your email to. This is typically the same provider as your inbox. MX records are not needed if your domain name is being used only to send out emails. It only counts for receiving.

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What are email blacklists?

An email blacklist is a service that identifies domains and IPs that are known to send spam. They are a necessary component to reduce the volume of spam that circulates the internet. These services can be private (run by ISPs) or public.

Typical ways that domains end up in spam lists are: spam complaints, incorrect email addresses and huge surges in email volume. All indicative of malicious intent.

Blacklists are not entirely the same thing as ending in the spam folder. If your message looks like spam (as analyzed by spam filters), you can still end up in the spam folder, even if the domain is not blacklisted.

If you end up in blacklists, you will need to contact each individual provider and request removal. A simpler approach is to change domain name used for sending email and not repeat the same mistakes that got you in there. If it's your primary company domain, there's not much choce, however.

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What is an SPF record?

SPF stands for Sender Policy Framework. In practice, it is a DNS entry added to your domain that lists servers and IP addresses that are allowed to send email using the domain.

When a server sends out an email, the receiving server will check if the SPF record lists the sender as a permitted sender. If it's not listed, the email can be marked as spam. This will largely depend on the receiving server settings.

In 2021, it is absolutely necessary to have a correct SPF record.

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What is DKIM?

DKIM is a technique that verified that the email was not modified while in transit from the sender to receiver.

DKIM is similar to SPF - it is added as an additional DNS record for your domain. The receiving server reads this value and checks if your email passes.

In 2021 it is necessary to have correct entries for DKIM.