SMTP errors and email delivery errors
Errors, their explanation and solutions
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Invalid email address error codes
Last Updated: 03.01.2024
If you send bulk emails, you may face the problem of delivery errors. Knowing the reasons will help you cope with it and increase conversions. After registering with SendPulse, you're welcome to monitor your campaign statistics, including the errors. Keep on reading this article to discover the causes and ways to avoid errors.
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The 550 5.1.1 error
Last Updated: 03.01.2024
There are several possible reasons that you received this error. In this guide, we'll talk about the reasons and help you resolve this nasty error.
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Spam related delivery errors
Last Updated: 03.01.2024
You may receive the following errors: SMTP Error 450 4.7.1
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Error 503
Last Updated: 26.09.2024
Have you ever faced Error 503 – Valid RCPT command must precede DATA while sending emails?
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How to fix SMTP sending errors
Last Updated: 28.12.2023
Sending messages via an SMTP server may be accompanied by errors. These errors may occur due to mail server inaccessibility, sender authentication issues, exceeded limits, mistyped email addresses, and so on.
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The 554 5.7.1 SMTP error
Last Updated: 26.09.2024
When sending an email, you should take into account two mailing servers: yours and the recipients.
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