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Why is email to email addresses with equals (=) rejected?

Question

Sending email to an account with an equals sign (e.g. ‘two=two@test.com’) works fine internally, but when customers from outside attempt to send email to the account, it fails with the error:

Requested action not taken: mailbox name not allowed.

Answer

GMS and GMS Webmail will process email to accounts with an equal sign in it (although Gordano does not recommend creating such accounts).

The error message reported above is not one that is created by GMS or GMS Webmail.

In this case, the firewall is interpreting the SMTP commands and inserting a response which it sends back to clients.

GMS or GMS Webmail has no part in this transaction.

Fix: Switch off the SMTP transaction checking carried out by the firewall.

Keywords:fire wall firewall email =

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