Results 1 to 14 of 14
-
06-21-2005, 08:52 AM #1Aspiring Evangelist
- Join Date
- Aug 2004
- Posts
- 417
SMTP issue: Dialup connection problem
A customer of mine (I know him IRL) is having problems sending emails using my SMTP server. When I do a Telnet to ANY smtp server (port 25) it connects but no data is sent from and to the server He has 2 different ISP's (dialup) and I tried on both of them, doesn't work, not even with the ISP's smtp server. The server is Exim btw
I tried disabling (and checking settings in) his firewall and antivirus but that doesn't help anything.
Any ideas? This is really strange... Thanks!
-
06-21-2005, 09:41 AM #2Web Hosting Guru
- Join Date
- Apr 2004
- Location
- India
- Posts
- 292
Hi,
What Dose logs say...? Telnet dosen't gurantee that everything is fine....
Are all services necessary to Mailing are running...?
need more info...
bye..thelinophile
Thinking Different !!
-
06-21-2005, 12:10 PM #3Aspiring Evangelist
- Join Date
- Aug 2004
- Posts
- 417
Well there is nothing wrong with my mailservers I think because it works fine for anybody else... And I didn't actually try with Telnet but with a RAW connection in Putty... It connects to the mailserver, but there's just no welcome message and the server doesn't react on my commands, like the data gets lost somewhere
What more info do you need btw?
-
06-22-2005, 03:35 AM #4Web Hosting Master
- Join Date
- Sep 2002
- Location
- Chicago, Illinois
- Posts
- 884
Try running exim on port 26, many ISP's block port 25 traffic.
Neosurge Web Services since 2002
Neosurge VPS Hosting
-
06-22-2005, 03:48 AM #5Junior Guru Wannabe
- Join Date
- May 2005
- Posts
- 67
Try scanning his machine for spyware. I had a client with this problem a while ago and after we cleaned his machine of spyware, the problem disappeared. Might work for you, might not...
-
06-22-2005, 03:34 PM #6Aspiring Evangelist
- Join Date
- Aug 2004
- Posts
- 417
I will try to run Exim on port 26 But I'm sure that the ISP is not blocking that because I already called their helpdesk and asked them about that (if was the first thing I could think of) and according to them, they don't block anything on port 25.
Spyware hmm will do but don't think so. I checked his PC on-sight for some ad/spy ware (like msconfig, browsed some folders, registry check etc) but I'll install ad-aware and let it run. I really doubt it as he only reads email, he doesn't surf alot, and he isn't more than 5 minutes online each time (just check mail, then disconnect).
I'll let you know what the port 26 did.
-
07-02-2005, 07:50 AM #7Aspiring Evangelist
- Join Date
- Aug 2004
- Posts
- 417
Well port 26 gave the same results
-
07-02-2005, 02:45 PM #8Junior Guru Wannabe
- Join Date
- Aug 2004
- Location
- PA
- Posts
- 59
So is SMTP running for everyone else? It's just one user who can't send email?
-
07-04-2005, 05:55 AM #9Aspiring Evangelist
- Join Date
- Aug 2004
- Posts
- 417
Yes, it's just one user...
-
07-04-2005, 06:09 AM #10Junior Guru
- Join Date
- Dec 2003
- Location
- Sunny So. Calif.
- Posts
- 213
When I do a Telnet to ANY smtp server (port 25) it connects but no data is sent from and to the server
Other than Ad-aware, you should also run Spybot, CWShredder, housecall.trendmicro.com, possibly HiJackThis, TrojanHunter, security.symantec.com, the list is almost endless. I often have to run 8 checks or more to find all the malicious stuff on an infected PC...
If he is running Windows XP, make sure the Windows firewall has Port 25 open, some PCs have both that and a 3rd party firewall at the same time.
Hmm, even when you switched to port 26 it still didn't work. Have you checked for DNS problems? Tried telnetting directly to your server IP rather than domain name?
Hmmm, thought just kicked in, is your server using any RBLs? Maybe his dialup IPs are being blocked, possibly by rblsmtp?
Just some suggestions
-
07-04-2005, 07:02 AM #11Aspiring Evangelist
- Join Date
- Aug 2004
- Posts
- 417
Well I'll run some anti-spyware and security tools on his PC
I disabled all firewalls while testing... Also the outgoing mail scanner from Norton AntiVirus.
Yep tried the IP directly.
Oh and: RBL's? That's a black-list checker, right? I don't have that installed...
Do you think using another port, maybe 10025 or something, could work? Then I'll try that.
-
07-04-2005, 07:29 AM #12Junior Guru
- Join Date
- Dec 2003
- Location
- Sunny So. Calif.
- Posts
- 213
Well, you've already tried port 26, wouldn't hurt to try another, but I wouldn't be hopeful that it will solve anything.
Yes, RBL capability is often pre-installed with a given Control Panel on servers. Although I'm not familiar with your setup (assuming Cpanel/Exim)
Have you tried Putty to the FTP port to see if you can login on the ftp port? Just for ****s & grins anyways...
Another thing I would do is to bring the client PC to my shop and use a broadband connection to test. If the broadband connection works, but the dialup does not, then I would seriously think of his dialup ISP doing port blocking, regardless of what 1st level phone support says (often don't know their head from a hole...)
-
07-04-2005, 10:30 AM #13Aspiring Evangelist
- Join Date
- Aug 2004
- Posts
- 417
Yes he's coming over today so I'll test it on my broadband connection, see if I can connect to the SMTP of my ISP. I think FTP will work, as I already used an FTP client to connect. But I will test it
-
07-04-2005, 11:49 AM #14Junior Guru
- Join Date
- Jul 2004
- Posts
- 246
Have you looked at the exim logs?
You are using smtp authentication...correct?