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Re: Sending SMTP mail to Verizon
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David H. Lipman
Aug 18, 2013, 3:56:37 PM8/18/13
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From: "D. Stussy" <spam+ne...@bde-arc.ampr.org>
> Last night, I finally discovered why e-mail I was trying to send to
> Verizon (via host "relay.verizon.net") wasn't going through. Verizon is
> suppressing ICMP error messages in their network, thus breaking
> path-MTU-discovery. One is not supposed to do that, especially since the
> Internet now has many pathways that have "jumbo frames" (i.e. >1500 bytes;
> usually around 9kB). It turns out that their incoming mail host actually
> sends a TCP RST packet in response to an oversized packet - which is even
> worse than dropping it because it immediately aborts the SMTP transaction.
>
> This is all Verizon's fault because it is their network which is
> misconfigured.
> What can all of us do to convince them to fix their error?
Nothing.
We Pegasus Mail users are trying to deal with their out of the ordinary
configurations and getting nowhere.
--
Dave
Multi-AV Scanning Tool - http://multi-av.thespykiller.co.uk
http://www.pctipp.ch/downloads/dl/35905.asp
> Last night, I finally discovered why e-mail I was trying to send to
> Verizon (via host "relay.verizon.net") wasn't going through. Verizon is
> suppressing ICMP error messages in their network, thus breaking
> path-MTU-discovery. One is not supposed to do that, especially since the
> Internet now has many pathways that have "jumbo frames" (i.e. >1500 bytes;
> usually around 9kB). It turns out that their incoming mail host actually
> sends a TCP RST packet in response to an oversized packet - which is even
> worse than dropping it because it immediately aborts the SMTP transaction.
>
> This is all Verizon's fault because it is their network which is
> misconfigured.
> What can all of us do to convince them to fix their error?
Nothing.
We Pegasus Mail users are trying to deal with their out of the ordinary
configurations and getting nowhere.
--
Dave
Multi-AV Scanning Tool - http://multi-av.thespykiller.co.uk
http://www.pctipp.ch/downloads/dl/35905.asp
tlvp
Aug 19, 2013, 8:58:19 PM8/19/13
to
On Sun, 18 Aug 2013 12:39:35 -0700, D. Stussy wrote:
> What can all of us do to convince them to fix their error?
Vote with your feet :-) ? HTH. Cheers, -- tlvp
> What can all of us do to convince them to fix their error?
--
Avant de repondre, jeter la poubelle, SVP.
Nomen Nescio
Sep 7, 2013, 7:24:47 AM9/7/13
to
>This is all Verizon's fault because it is their network which is
>misconfigured. What can all of us do to convince them to fix their
>error?
There are so many problems with Verizon. They also use a DNSBL to
block e-mail purely on the crude and sloppy basis of IP address. They
also have an ethical deficit, as they support CISPA.
Please do not try to help Verizon fix their problems. They are evil
and incompetent. Just walk.
Instead of emailing a Verizon user, tell them to give you an email
address that works, like a hushmail.com address.
Message has been deleted
Anonymous
Oct 10, 2013, 4:07:23 PM10/10/13
to
Anonymous
Nov 29, 2013, 9:59:13 PM11/29/13
to
>This is all Verizon's fault because it is their network which is
>misconfigured. What can all of us do to convince them to fix their
>error?
There are so many problems with Verizon. They also use a DNSBL to
block e-mail purely on the crude and sloppy basis of IP address. They
also have an ethical deficit, as they support CISPA.
Please do not try to help Verizon fix their problems. They are evil
and incompetent. Just walk.
Instead of e-mailing a Verizon user, tell them to give you an e-mail
>misconfigured. What can all of us do to convince them to fix their
>error?
There are so many problems with Verizon. They also use a DNSBL to
block e-mail purely on the crude and sloppy basis of IP address. They
also have an ethical deficit, as they support CISPA.
Please do not try to help Verizon fix their problems. They are evil
and incompetent. Just walk.
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