[Shorewall-users] Yahoo mail connection issue

[pgeenhuizen]

I'm not sure if this is a shorewall issue or not, but I hope that
someone can give me some pointers or ideas how to try to solve this issue

I'm running Shorewall 4.6.13 on Centos 6.8, and my own mail server.

I have this rule in place for my email
DNAT net loc:192.xxx.xxx.16 tcp
http,https,imap,imaps,smtp,smtps

My problem is that whenever someone using an AT&T phone or form
Bellsouth.net sends me email it fails and the email is returned to the
sender as failed with this error

"Mail server for "geenhuizen.net" unreachable for too long"

Apparently both AT&T and Bellsouth use yahoo mail service, however if
someone on Yahoo mail sends me an email it works just fine.

I've looked through /var/log/maillog but can't find the connection at
all, and I can't find any connection in the shorewall logs either. I
must confess that I don't know what to specifically look for in the
shorewall logs.

So what to do?

Thanks
Pete

[Nigel Aves]

Pete,

Do you have a AT&T or Bellsouth email address? If you do, or know
someone who does, check out the email header.

I've found in the past that it is a good source for debugging.

Nigel.



email address? If you do look at the header information.

Post by pgeenhuizen
I'm not sure if this is a shorewall issue or not, but I hope that
someone can give me some pointers or ideas how to try to solve this issue
I'm running Shorewall 4.6.13 on Centos 6.8, and my own mail server.
I have this rule in place for my email
DNAT net loc:192.xxx.xxx.16 tcp
http,https,imap,imaps,smtp,smtps
My problem is that whenever someone using an AT&T phone or form
Bellsouth.net sends me email it fails and the email is returned to the
sender as failed with this error
"Mail server for "geenhuizen.net" unreachable for too long"
Apparently both AT&T and Bellsouth use yahoo mail service, however if
someone on Yahoo mail sends me an email it works just fine.
I've looked through /var/log/maillog but can't find the connection at
all, and I can't find any connection in the shorewall logs either. I
must confess that I don't know what to specifically look for in the
shorewall logs.
So what to do?
Thanks
Pete

[pgeenhuizen]

Nigel,

Thanks for the response, that was my first response to the problem.

The problem that I'm having is that I can't find any trace of a
connection attempt in either my mail server log nor in my shorewall
log. If the connection is being made to my fire wall I can't figure out
how to detect it, i.e. what should I look for?

I must confess that the info that shorewall logs is to say the least
daunting and to my eyes rather obscure I've tried lining up the time of
the email with the appropriate time in both logs but unfortunately don't
see any correlation.

Pete

Post by Nigel Aves
Pete,
Do you have a AT&T or Bellsouth email address? If you do, or know
someone who does, check out the email header.
I've found in the past that it is a good source for debugging.
Nigel.
email address? If you do look at the header information.

Post by pgeenhuizen
I'm not sure if this is a shorewall issue or not, but I hope that
someone can give me some pointers or ideas how to try to solve this issue
I'm running Shorewall 4.6.13 on Centos 6.8, and my own mail server.
I have this rule in place for my email
DNAT net loc:192.xxx.xxx.16 tcp
http,https,imap,imaps,smtp,smtps
My problem is that whenever someone using an AT&T phone or form
Bellsouth.net sends me email it fails and the email is returned to the
sender as failed with this error
"Mail server for "geenhuizen.net" unreachable for too long"
Apparently both AT&T and Bellsouth use yahoo mail service, however if
someone on Yahoo mail sends me an email it works just fine.
I've looked through /var/log/maillog but can't find the connection at
all, and I can't find any connection in the shorewall logs either. I
must confess that I don't know what to specifically look for in the
shorewall logs.
So what to do?
Thanks
Pete

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, SlashDot.org! http://sdm.link/slashdot
_______________________________________________
Shorewall-users mailing list
https://lists.sourceforge.net/lists/listinfo/shorewall-users