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Import subscriber hangs / call to undefined function mb_strtolower()

Email Marketer requires the PHP extension 'mbstring' for the import contacts feature. If you do not have the extension *most* servers will generate the error message:

call to undefined function mb_strtolower()

You can enable the extension from your PHP configuration file (php.ini), but depending on your hosting environment you may need to contact your server provider or system administrator for assistance.

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