2006-03-23 08:46:06 H=host-148-244.block.alestra.net.mx (dominio.com.mx) [148.244.xxx.xxx) sender verify fail for <sannicolas@dominio2.com.mx>: response to "MAIL FROM:<>" from mail.dominio2.com.mx [148.244.xxx.xxx] was: 501 <> : domain string is NULL.
2006-03-23 08:46:06 H=host-148-244.block.alestra.net.mx (dominio.com.mx) [148.244.xxx.xxx] F=<sannicolas@dominio2.com.mx> rejected RCPT <user@dominio.com.mx>: Sender verify failed


Y en exim no tengo palomeada la opcion de sender verity

estrac