buenas tardes me pueden apoyar en decirme como soluciono este error que esta marcando cuando me envian un correo
From: Mail Delivery System mailer-daemon@kundenserver.de To: nava@tecniflex.biz Cc: Date: Fri, 3 Jun 2016 08:22:27 -0500 Subject: Mail delivery failed: returning message to sender This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
guillena@grecargo.com.mx: SMTP error from remote server for MAIL FROM command, host: mail.grecargo.com.mx (189.254.21.3) reason: 550 5.7.1 Access denied
lo raro es que es nada mas en algunos correos que nos envian
gracias