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Legacy Forums => General Discussion (Legacy) => Topic started by: SMEmike on October 19, 2004, 06:34:57 AM

Title: SMTP from Internet seems blocked
Post by: SMEmike on October 19, 2004, 06:34:57 AM

Hi.
 
I am new to SMEServer and am trying to get the mail flowing.  I have done a clean install using the following:
- SME Server v6.0.1-01
- Knudsen's "Howto install Clam Antivirus for dummies" Contrib
- CD-Utils for SMEServer
 
My configuration is as follows:
- server & gateway
- ADSL to the Internet using Bell Sympatico (Canada)
- Antivirus turned off (for now)
- Email Settings:
  -- Email retrieval mode = standard (SMTP)
  -- Pop & Imap Access = only local networks
  -- Webmail = enabled, secure access only
  -- Internal Email Server = blank
  -- Address of Internet Provider's mail server = FQDN for Sympatico
  -- ETRN settings = all blank
 
I finally got outgoing mail working by using my ISP's mail server.  It seems that the server for the test email I was using doesn't accept incoming SMTP from a dynamically assigned IP address outside its own users :(
 
No matter what I try, I cannot access the SME's qmail STMP port.  Here are some commands run as root via ssh:
 
  [root@server root]# netstat -l | grep smtp
  tcp        0      0 *:smtp                  *:*                     LISTEN
 
  [root@server root]# ps -efw | grep mail
  root       387   353  0 Oct15 ?        00:00:00 supervise qmail
  root       390   353  0 Oct15 ?        00:00:00 supervise smtpfront-qmail
  qmaill     398   388  0 Oct15 ?        00:00:00 /usr/local/bin/multilog t s5000000 /var/log/qmail
  qmaill     414   391  0 Oct15 ?        00:00:00 /usr/local/bin/multilog t s5000000 /var/log/smtpfront-qmail
  qmaill     415   402  0 Oct15 ?        00:00:00 /usr/local/bin/multilog t s5000000 /var/log/pppoe
  root      1633   410  0 Oct15 ?        00:00:00 /usr/local/bin/tcpserver -v -R -H -l 0 0 110 /var/qmail/bin/qmail-popup localhost /b
  qmaild    2267   390  0 Oct15 ?        00:00:00 /usr/local/bin/tcpserver -v -U -R -x /etc/tcprules/tcp.smtp.cdb -c 40 -l 0 0 smtp /u
  qmails   29679   387  0 17:02 ?        00:00:00 qmail-send
  root     29680 29679  0 17:02 ?        00:00:00 qmail-lspawn ./Maildir/
  qmailr   29681 29679  0 17:02 ?        00:00:00 qmail-rspawn
  qmailq   29682 29679  0 17:02 ?        00:00:00 qmail-clean
  qmailq   30318     1  0 19:19 ?        00:00:00 clamd
  root     31298 30549  0 22:10 pts/2    00:00:00 grep mail
 
  [root@server root]# telnet localhost 25
  Trying 127.0.0.1...
  Connected to localhost.
  Escape character is '^]'.
  220 server.lifeteen.dyndns.org mailfront ESMTP
 

My attempts to connect from the Internet have produced the following:
 
  [mike@server2 stleonards]$ telnet lifeteen.dyndns.org 25
  Trying 64.230.17.140...
  telnet: connect to address 64.230.17.140: Connection timed out

 
Ethereal shows SYN packets being sent but no response.
 
The only thing that I can think of is that the SME server ISP
(Sympatico) is blocking incoming SMTP traffic.
 
Can anyone else contact the SMTP server at lifeteen.dyndns.org
or have I made some configuration errors?

Thanks in advance,
Mike.

Title: SMTP from Internet seems blocked
Post by: mbachmann on October 19, 2004, 02:05:15 PM

I can see it via dyndns.

* + 64.230.17.140   Ottawa-HSE-ppp257899.sympatico.ca
   |___    22  SSH Remote Login Protocol
   |___    25  Simple Mail Transfer
   |___    80  World Wide Web HTTP
   |___   113  Authentication Service
   |___   443  https  MCom
   |___  1723  pptp


So what do you want do do with a name like "lifeteen", tell me.

Title: SMTP from Internet seems blocked
Post by: SMEmike on October 19, 2004, 04:20:51 PM

Thanks for the reply mbachmann.

It looks like you did an nmap scan of lifeteen.dyndns.org and got exactly what I get from my home ISP EXCEPT for port 25 which is reported as filtered.

If you can access port 25 from your ISP (assuming it is not Bell Sympatico), then the sites ISP doesn't seem to be blocking incoming SMTP.

Could you please try to email admin@lifeteen.dyndns.org to see if my dydns.org MX record is working properly:
lifeteen.dyndns.org.    43200   IN      MX      10 lifeteen.dyndns.org.

I have tried emailing from both my home ISP (rogers.com with mail supported by yahoo.com) and from another webmail product (namezero.com).  In the rogers case, I get a failure delivery.  I am still waiting for a timeout on the namezero case (but the email has not delivered within 30 minutes).

Thanks again,
SMEmike

P.S.  Life Teen is a Catholic youth program started in the US.  I am helping to support it in our church in Ottawa, Canada (see www.lifeteen.com and www.lifeteen.org for more info).

Title: SMTP from Internet seems blocked
Post by: bobk on October 20, 2004, 01:15:40 AM

SMEmike,

Quote

[root@mabit01 root]# telnet lifeteen.dyndns.org 25
Trying 64.230.17.140...
telnet: connect to address 64.230.17.140: Connection timed out

Other people are having problems with Sympatico, take a look at this forum posting thread http://forums.contribs.org/index.php?topic=24485.0

Title: SMTP from Internet seems blocked
Post by: SMEmike on October 20, 2004, 04:22:35 AM

bobk.  

Thanks for the test.  I had noticed your referenced post earlier but failed to note its Sympatico significance.  I have not been able to send mail using three webmail services or my home ISP.

Mike.

Title: SMTP from Internet seems blocked
Post by: SMEmike on October 20, 2004, 04:24:31 AM

All.

Thanks for the help.  I just got off the phone with Sympatico tech support and have confirmed that SMTP port 25 is blocked both incoming and outgoing with no way of removing the block.

Guess I'll have to change ISPs or get a mail port redirection service.

Thanks again,
Mike.