Am 13.10.2016 um 16:57 schrieb SipriusPT: > SMTP Error (550): Failed to add recipient "XXX" (Please turn on SMTP > Authentication in your mail client. > XXX (XXX.local) [XXX]:XXX > is not permitted to relay through this server without authentication.).
You need to set$config['smtp_user']='%u' and $config['smtp_pass']='%p' See https://github.com/roundcube/roundcubemail/wiki/Configuration#sending-messages-via-smtp Best, Jan
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