mail error

[nokia80]

gladly I want know why I get these error




2B11D1AD352 4974 Thu Oct 29 08:15:01 xxxxxxxx@webhd.nl
(Host or domain name not found. Name service error for name=hetnet.nl type=MX: Host not found, try again)
xxxxxxxx@hetnet.nl

228AD1AD35A 14755 Thu Oct 29 09:22:48 gfjhdgf@kgfhklgf.nl
(Host or domain name not found. Name service error for name=gmail.com type=MX: Host not found, try again)
xxxxxxxx@gmail.com

5057A1AD34F 6320 Thu Oct 29 08:08:33 xxxxxx@webhd.nl
(Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
xxxxxxxx@hotmail.com

53FFF1AD345 4562 Thu Oct 29 07:51:12 xxxxxxl@webhd.nl
(Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
xxxxxxxx@hotmail.com

[till]

There is no working dns server in /etc/resolv.conf listed.