急!接入PIX 515后,exchange server发不了邮件!

急!!接入PIX 515后,发不了邮件!!!
我的EXCHANGE SERVER测试没有问题,直接接入Internet上可以正常收发,
但是通过PIX 515接入Internet就有问题了,不能发。收没有问题。
telnet 25口就提示:
220************************************************0*2*****2*************
*******************2002**************2********0******00
为什么???????请帮帮忙。。。。。很急
PIX 515配置如下。。。

pix515#wr t

no snmp-server location conduit permit tcp hos
no snmp-server contact any
snmp-server community public---------------------
pix515
no snmp-server enable trapsicmp any any
floodguard enableconfig)# nat
pix
no sysopt route dnat Cisco Secu
pix
telnet timeout 5
: Saved
:
PIX Version 6.0(1)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd PLBb27eKLE1o9FTB encrypted
hostname pix515
fixup protocol ftp 21
fixup protocol http 80
fixup protocol h323 1720
fixup protocol rsh 514
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol sip 5060
fixup protocol skinny 2000
names
pager lines 24
interface ethernet0 auto
interface ethernet1 auto
mtu outside 1500
mtu inside 1500
ip address outside ×.×.×.94 255.255.255.0
ip address inside 10.208.1.250 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm history enable
arp timeout 14400
global (outside) 1 ×.×.×.27
nat (inside) 1 10.208.1.0 255.255.255.0 0 0
static (inside,outside) ×.×.×.93 10.208.1.252 netmask 255.255.255.255 0 0
static (inside,outside) ×.×.×.96 10.208.1.248 netmask 255.255.255.255 0 0
conduit permit tcp host ×.×.×.93 eq www any
conduit permit tcp host ×.×.×.93 eq ftp any
conduit permit tcp host ×.×.×.93 eq 65535 any
conduit permit tcp host ×.×.×.96 eq pop3 any
conduit permit tcp host ×.×.×.96 eq smtp any
conduit permit tcp host ×.×.×.96 eq nntp any
conduit permit icmp any any
route outside 0.0.0.0 0.0.0.0 ×.×.×.62 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 si
p 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
no sysopt route dnat
telnet timeout 5
ssh timeout 5
terminal width 80
Cryptochecksum:b5f9daa9ae886×9a8709d5f9db3d885
: end
[OK]
多谢了!!!!

[2929 byte] By [yeon168-yeon168] at [2008-6-10]