[afnog] Failing to receive inbound emails

Mon Jan 23 10:38:34 UTC 2012

I have a postfix email installation on linux. I can send emails to other
domains and my ISP relays the emails. However I get relay access denied
messages when I send emails to my domain. I get the following error
message,

*Delivery to the following recipient failed permanently:

*
*     *

*test at yyyyy.ac.zw*

*
Technical details of permanent failure:*

*Google tried to deliver your message, but it was rejected by the recipient
domain. We recommend contacting the other email provider for further
information about the cause of this error. The error that the other server
returned was: 550 550 unknown user test at yyyyy.ac.zw(state 17)*

On the firewall interface I am getting the following error

 *Jan 18 15:54:57 xxxxx-SERVER postfix/smtpd[31115]: NOQUEUE: reject: RCPT
from ssss.ttttttt.com[aaa.bbb.ccc.49]: 554 5.7.1 <test at yyyyy.ac.zw>: Relay
access denied; from=<> to=<test at yyyyy.ac.zw> proto=SMTP helo=<
ssss.ttttttt.com>*
**

I have two email servers, 192.168.1.2 hosting xxxxx domain,  works fine and
192.168.1.10 with the yyyyy domain failing to receive emails. I am using
the same ISP for routing emails. The xxxxx domain is the one registered
usng the public address  that I am also using for domain yyyyy. How do I
configure my firewall to direct traffic for yyyyy domain to the
192.168.1.10 server? See my current  firewall configuration below

PIX Version 6.3(3)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password Ya33doEYpauqoRPP encrypted
passwd Ya33doEYpauqoRPP encrypted
hostname xxxxxA
domain-name xxxxx.co.zw
fixup protocol dns maximum-length 512
fixup protocol ftp 21
no fixup protocol h323 h225 1720
no fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
no fixup protocol sip 5060
no fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
name 192.168.1.3 hotspot
name 192.168.1.2 xxxxx
name 192.168.1.10 yyyyy
access-list inbound deny icmp any any
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq www
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq smtp
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 8080
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq domain
access-list inbound permit udp any host aaa.bbb.ddd.14 eq domain
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq ftp
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 4848
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 81
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 3000
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 8000
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 8005
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 8443
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 8009
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq https
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq ssh
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 8081
access-list inbound permit tcp any host aaa.bbb.ddd.14 eq 8082
access-list 101 permit ip any any
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside aaa.bbb.ddd.14 255.255.255.252
ip address inside 192.168.1.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm location 192.168.1.6 255.255.255.255 inside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 10 interface
nat (inside) 10 0.0.0.0 0.0.0.0 0 0
alias (inside) xxxxx aaa.bbb.ddd.14 255.255.255.255
static (inside,outside) tcp interface smtp xxxxx smtp netmask
255.255.255.255 0 0
static (inside,outside) tcp interface www xxxxx www netmask 255.255.255.255
0 0
static (inside,outside) tcp interface 8080 xxxxx 8080 netmask
255.255.255.255 0 0
static (inside,outside) tcp interface ftp xxxxx ftp netmask 255.255.255.255
0 0
static (inside,outside) tcp interface 81 xxxxx 81 netmask 255.255.255.255 0
0
static (inside,outside) tcp interface 4848 xxxxx 4848 netmask
255.255.255.255 0 0
access-group inbound in interface outside
route outside 0.0.0.0 0.0.0.0 aaa.bbb.ddd.13 1
route inside 192.168.0.0 255.255.255.0 hotspot 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225
1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
aaa authentication telnet console LOCAL
aaa authentication http console LOCAL
http server enable
http 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
telnet aaa.bbb.ddd.12 255.255.255.252 outside
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 50
ssh timeout 60
console timeout 0
dhcpd dns aaa.bbb.ccc.1 aaa.bbb.ccc.4
username admin password fuqXsBJRQmphzmcC encrypted privilege 15
terminal width 80
Cryptochecksum:2d70437ecde3ce671db45b421f97351f
: end

Regards,

R Gadhula

-- 
*Senior Systems Administrator
UZCHS- NECTAR
Ward C10, Parirenyatwa Hospital
Mazoe St, Avondale
Harare
Tel: +263772 148 889/890 x 320
Cell:0772588210*
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