Hola, acabamos de hacer una prueba y siguen viniendo de vuelta como error, si hay alguna mander os mando el mail del ejemplo por privado: I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <XXX@XXXX.com>: host mx.dominios.telefonica.net[213.4.149.229] said: 550 5.1.1 <XXXXX@XXXX.com> recipient rejected (in reply to RCPT TO command) otro ejemplo: This is the mail system at host pri.trocobank.com. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <XXXXX@XXXX.com>: host mx.dominios.telefonica.net[213.4.149.229] said: 552 5.2.0 N8YK1l00a1d4E2K068YKlq internal error (in reply to end of DATA command)
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