[otrs] E-mail notifications failing

Hi I'm having some trouble with the e-mail notifications, to be more specific the following error occurs: "Recipient address rejected: unverified address: Address verification in progress ! Enable Net::SMTP debug for more info!" Can anyone help me with this? Thanks and regards María Alejandra Piedra Unidad de Informática y Sistemas de Información IICA (506) 2216-0171 Alejandra.Piedra@iica.intmailto:Alejandra.Piedra@iica.int