SMTP - Spam protection | Support & Help

SMTP (Simple Mail Transfer Protocol)

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General questions

What is SMTP authentication?

SMTP authentication is an extension of the ESMTP protocol. It allows the mail server to authenticate clients from their user names and passwords.


My e-mails arrive with a delay? What can I do?

Delays can occur. If an e-mail is delayed, you will receive a warning. If an e-mail does not arrive, you will receive an error message. When e-mails have several recipients, some recipients might receive the e-mails with a delay.


What can I do when e-mails are not sent?

E-Mail assistent


Questions about and explanations on the settings

E-mail assistent
E-Mail Setup


Settings for third-party providers

Please ask your e-mail provider directly for the correct settings.

Answers to FAQs