CANT RECEIVE EMAIL FROM INTERNET BUT CAN SEND

miklasz

Newbie

Posts: 7

CANT RECEIVE EMAIL FROM INTERNET BUT CAN SEND - SERVER SIDE IS OK (checked)

« on: June 14, 2012, 10:32:08 pm »

hello, I am struggling with this problem for over 2 weeks now... (administrator LVL).... I dont know what is going on.....

i have domain: miklasz.co.uk I am able to send emails from server out to Internet..... but when I reply for example from gmail.com they just gone on the way.... no msg: email undelivered.... etc.

but if i login by telnet to port 25 to my (mx) mail.miklasz.co.uk - msg is delivered to inbox on the server....

I use ipv6 tunnel, is it possible that my internet provider can still block port 25 even if i use ipv6 over ipv4 tunnel ?

my topology:
tunnel broker: 2001:470:1f08:156::1 <-> cisco 2620mx 2001:470:1f08:156::2 <-> Cisco network port: 2001:470:1f09:156::1 <-> server 2001:470:1f09:156::10 (miklasz.co.uk, mail.miklasz.co.uk)

ping to miklasz.co.uk works fine with no problem.....
also i use cisco 2620mx router.....

please advise.......

any idea ?


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miklasz

Newbie

Posts: 7

Re: CANT RECEIVE EMAIL FROM INTERNET BUT CAN SEND - SERVER SIDE IS OK (checked)

« Reply #1 on: June 15, 2012, 08:25:31 am »

little update, ive checked with my provider they dont block port 25 :/


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jtcloe

Newbie

Posts: 46

Re: CANT RECEIVE EMAIL FROM INTERNET BUT CAN SEND - SERVER SIDE IS OK (checked)

« Reply #2 on: June 15, 2012, 12:46:49 pm »

Google doesn't currently send out email over ipv6, and your only MX record points to a name that only has an AAAA record, not an A record.

Last time I checked, none of the big3 did (google, yahoo, hotmail/msn).

Your ipv6 is from HE, so it would be doubtful your isp would be blocking smtp on tunnelled traffic.

I can hit port 25 on your mail server from another HE IP:

Code:

220 WIN-327SUH9SP8Q.miklasz.co.uk Microsoft ESMTP MAIL Service ready at Fri, 15 Jun 2012 20:36:59 +0100

I've never used any, but there are several autoresponders out there that are dual stacked or ipv6 only, here's one I found from a quick google query:

http://www.v6address.com/node/14

It says it will respond to anything you send it with the headers of the email you sent, so should be good for troubleshooting/verifying your setup.


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miklasz

Newbie

Posts: 7

Re: CANT RECEIVE EMAIL FROM INTERNET BUT CAN SEND - SERVER SIDE IS OK (checked)

« Reply #3 on: June 15, 2012, 05:18:19 pm »

this was very helpful !!!

many thanks

didnt know about google sends v4 only Shocked

right !!!

Mission Success....

just for future reference.... DONT FORGET TO CHANGE NS DELEGATION FOR RDNS

due to my registrar i had to use different free dns managmet to manage my domain with PTR, unfortunatly Heart Internet dont support it.... so ive used... zerigo.com
and when i did that - ive forgot to change NS in http://www.tunnelbroker.net control panel.

Thx for reply!!!


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