Re: Banned by Yahoo?

On 12/1/16 1:35 PM, Fongaboo wrote:

But can they really blame the middleman (us) for mail that is just 
passing through our hands?
Yes they can, and they do. Unlike Google, which seems able to mostly 
usally eventually figure this out, Yahoo mail has *always* been a source 
of frustration because they honestly do not seem to know what they are 
doing.


I no longer forward to Yahoo at all.

The only mail that I consistently have an issue with google is forwarded 
facebook mails which gmail rejects 100% of the time based on DMARC.

RE: Banned by Yahoo?

[Fazzina, Angelo]

Here, for my config anyway.
You can read the docs on how transport file works.
Good luck.
-ALF

/etc/postfix/maps/transport

#  Slow transport for AOL 
# 'slowaol'  are configured in master.cf and main.cf
aol.com slowaol:aol.com

-Angelo Fazzina
Operating Systems Programmer / Analyst 
University of Connecticut,  UITS, SSG, Server Systems
860-486-9075


-Original Message-
From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] 
On Behalf Of Fongaboo
Sent: Thursday, December 1, 2016 5:02 PM
To: Postfix users <postfix-users@postfix.org>
Subject: RE: Banned by Yahoo?


This sounds like a great idea. Where do you actually specify AOL's mail 
servers for this rule?


On Thu, 1 Dec 2016, Fazzina, Angelo wrote:

> Hi, I throttle my traffic to AOL and HOTMAIL, maybe you need to do the same 
> for Yahoo.
> I had to lookup each ISP's limits to configure it in Postfix to help with all 
> the mail to them getting deferred.
>
> I must say it has been years since users complained about mail not getting 
> delivered to those domains, and it used to be weekly.
> -ALF
>
>
> Main.cf
> slowaol_destination_recipient_limit = 10
> slowaol_destination_concurrency_limit = 2
> slowaol_destination_rate_delay = 30s
>
> master.cf
> slowaol   unix  -   -   n   -   1   smtp
>
>
> -Angelo Fazzina
> Operating Systems Programmer / Analyst
> University of Connecticut,  UITS, SSG, Server Systems
> 860-486-9075
>
> -Original Message-
> From: owner-postfix-us...@postfix.org 
> [mailto:owner-postfix-us...@postfix.org] On Behalf Of Fongaboo
> Sent: Thursday, December 1, 2016 3:36 PM
> To: Postfix users <postfix-users@postfix.org>
> Cc: d...@dinocovelli.com; mec...@mechno.com
> Subject: Banned by Yahoo?
>
>
> I've been getting a lot of these errors for mail sent to Yahoo all of a
> sudden:
>
>> 421 4.7.0 [TSS04] Messages from 24.105.170.68 temporarily deferred due to 
>> user complaints - 4.16.55.1; see 
>> https://help.yahoo.com/kb/postmaster/SLN3434.html (in reply to MAIL FROM 
>> command))
>
> The included link states:
>
>> Error: "421 4.7.0 [XXX] Messages from x.x.x.x temporarily deferred due
>> to user complaints - 4.16.55.1" when sending email to Yahoo
>>
>> This error indicates Yahoo is seeing unusual traffic from your IP
>> address and/or that emails from your mail server are generating
>> complaints from Yahoo Mail users.
>
> I checked MXDomainTool and we're not on any blacklists (not that I would
> expect that to be related). But I did a thorough check for any config
> mishaps that might have us open relaying, but we are closed up tight.
>
> However we do have virtual aliases on hosted domains that ultimately point
> to yahoo.com addresses. Undoubtedly, I can reference instances of spam
> received to the virtual and then forwarded on to Yahoo's mailserver from
> there.
>
> But can they really blame the middleman (us) for mail that is just passing
> through our hands? I mean, I understand it's possible for them to do
> whatever they please. But mostly just looking for a sanity check that I am
> corectly ascertaining what is happening and what they are doing?
>
> I saw some earlier posts on a similar issue with Yahoo, but it related to
> rate-limiting rather than 4-hour bans. Not sure if it was the same
> instigating factor but they've just changed their policy...
>
> Any ideas welcome... But also looking for a sanity check on one thing I
> was thinking of trying:
>
> Find any virtual aliases that point to yahoo.com or ymail.com addresses...
> replace the aliases with a virtual MAILBOX that *forwards* to Yahoo. Then,
> as per my configuration, any mail destinated for yahoo will be scanned by
> Maia-Mailguard/SpamAssassin before it is allowed to leave for Yahoo.
>
> My hope would be that once yahoo-destinated spam passing through my server
> slows down they will unban.
>
> TIA for sanity checks!
>
>
> FONG
>

RE: Banned by Yahoo?

[Fongaboo]

This sounds like a great idea. Where do you actually specify AOL's mail 
servers for this rule?



On Thu, 1 Dec 2016, Fazzina, Angelo wrote:


Hi, I throttle my traffic to AOL and HOTMAIL, maybe you need to do the same for 
Yahoo.
I had to lookup each ISP's limits to configure it in Postfix to help with all 
the mail to them getting deferred.

I must say it has been years since users complained about mail not getting 
delivered to those domains, and it used to be weekly.
-ALF


Main.cf
slowaol_destination_recipient_limit = 10
slowaol_destination_concurrency_limit = 2
slowaol_destination_rate_delay = 30s

master.cf
slowaol   unix  -   -   n   -   1   smtp


-Angelo Fazzina
Operating Systems Programmer / Analyst
University of Connecticut,  UITS, SSG, Server Systems
860-486-9075

-Original Message-
From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] 
On Behalf Of Fongaboo
Sent: Thursday, December 1, 2016 3:36 PM
To: Postfix users 
Cc: d...@dinocovelli.com; mec...@mechno.com
Subject: Banned by Yahoo?


I've been getting a lot of these errors for mail sent to Yahoo all of a
sudden:


421 4.7.0 [TSS04] Messages from 24.105.170.68 temporarily deferred due to user 
complaints - 4.16.55.1; see https://help.yahoo.com/kb/postmaster/SLN3434.html 
(in reply to MAIL FROM command))


The included link states:


Error: "421 4.7.0 [XXX] Messages from x.x.x.x temporarily deferred due
to user complaints - 4.16.55.1" when sending email to Yahoo

This error indicates Yahoo is seeing unusual traffic from your IP
address and/or that emails from your mail server are generating
complaints from Yahoo Mail users.


I checked MXDomainTool and we're not on any blacklists (not that I would
expect that to be related). But I did a thorough check for any config
mishaps that might have us open relaying, but we are closed up tight.

However we do have virtual aliases on hosted domains that ultimately point
to yahoo.com addresses. Undoubtedly, I can reference instances of spam
received to the virtual and then forwarded on to Yahoo's mailserver from
there.

But can they really blame the middleman (us) for mail that is just passing
through our hands? I mean, I understand it's possible for them to do
whatever they please. But mostly just looking for a sanity check that I am
corectly ascertaining what is happening and what they are doing?

I saw some earlier posts on a similar issue with Yahoo, but it related to
rate-limiting rather than 4-hour bans. Not sure if it was the same
instigating factor but they've just changed their policy...

Any ideas welcome... But also looking for a sanity check on one thing I
was thinking of trying:

Find any virtual aliases that point to yahoo.com or ymail.com addresses...
replace the aliases with a virtual MAILBOX that *forwards* to Yahoo. Then,
as per my configuration, any mail destinated for yahoo will be scanned by
Maia-Mailguard/SpamAssassin before it is allowed to leave for Yahoo.

My hope would be that once yahoo-destinated spam passing through my server
slows down they will unban.

TIA for sanity checks!


FONG

Re: Banned by Yahoo?

[Wietse Venema]

Fongaboo:
[forwarding spam to Yahoo and getting blocked]
> But can they really blame the middleman (us) for mail that is just passing 
> through our hands? I mean, I understand it's possible for them to do 

Absolutely. Yahoo is not the only one who does this, by the way.

Wietse

RE: Banned by Yahoo?

[Fazzina, Angelo]

Hi, I throttle my traffic to AOL and HOTMAIL, maybe you need to do the same for 
Yahoo.
I had to lookup each ISP's limits to configure it in Postfix to help with all 
the mail to them getting deferred.

I must say it has been years since users complained about mail not getting 
delivered to those domains, and it used to be weekly.
-ALF


Main.cf
slowaol_destination_recipient_limit = 10
slowaol_destination_concurrency_limit = 2
slowaol_destination_rate_delay = 30s

master.cf
slowaol   unix  -   -   n   -   1   smtp


-Angelo Fazzina
Operating Systems Programmer / Analyst 
University of Connecticut,  UITS, SSG, Server Systems
860-486-9075

-Original Message-
From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] 
On Behalf Of Fongaboo
Sent: Thursday, December 1, 2016 3:36 PM
To: Postfix users 
Cc: d...@dinocovelli.com; mec...@mechno.com
Subject: Banned by Yahoo?


I've been getting a lot of these errors for mail sent to Yahoo all of a 
sudden:

> 421 4.7.0 [TSS04] Messages from 24.105.170.68 temporarily deferred due to 
> user complaints - 4.16.55.1; see 
> https://help.yahoo.com/kb/postmaster/SLN3434.html (in reply to MAIL FROM 
> command))

The included link states:

> Error: "421 4.7.0 [XXX] Messages from x.x.x.x temporarily deferred due 
> to user complaints - 4.16.55.1" when sending email to Yahoo
>
> This error indicates Yahoo is seeing unusual traffic from your IP 
> address and/or that emails from your mail server are generating 
> complaints from Yahoo Mail users.

I checked MXDomainTool and we're not on any blacklists (not that I would 
expect that to be related). But I did a thorough check for any config 
mishaps that might have us open relaying, but we are closed up tight.

However we do have virtual aliases on hosted domains that ultimately point 
to yahoo.com addresses. Undoubtedly, I can reference instances of spam 
received to the virtual and then forwarded on to Yahoo's mailserver from 
there.

But can they really blame the middleman (us) for mail that is just passing 
through our hands? I mean, I understand it's possible for them to do 
whatever they please. But mostly just looking for a sanity check that I am 
corectly ascertaining what is happening and what they are doing?

I saw some earlier posts on a similar issue with Yahoo, but it related to 
rate-limiting rather than 4-hour bans. Not sure if it was the same 
instigating factor but they've just changed their policy...

Any ideas welcome... But also looking for a sanity check on one thing I 
was thinking of trying:

Find any virtual aliases that point to yahoo.com or ymail.com addresses... 
replace the aliases with a virtual MAILBOX that *forwards* to Yahoo. Then, 
as per my configuration, any mail destinated for yahoo will be scanned by 
Maia-Mailguard/SpamAssassin before it is allowed to leave for Yahoo.

My hope would be that once yahoo-destinated spam passing through my server 
slows down they will unban.

TIA for sanity checks!


FONG

Re: Banned by Yahoo?

[Viktor Dukhovni]

On Thu, Dec 01, 2016 at 03:35:40PM -0500, Fongaboo wrote:

> However we do have virtual aliases on hosted domains that ultimately point
> to yahoo.com addresses. Undoubtedly, I can reference instances of spam
> received to the virtual and then forwarded on to Yahoo's mailserver from
> there.
> 
> But can they really blame the middleman (us) for mail that is just passing
> through our hands?

Yes!  And that's in fact what one would expect.

They can't be expected to distinguish between a well-meaning
mail-forwarder and a spammer forging Received headers.

To avoid getting blacklisted, improve your filters for the forwarded
mailboxes, or tell your Yahoo users  that you will no longer forward
their mail to Yahoo.  At the very least such users need to be taught
to not report to Yahoo mail you forward for them as spam.

-- 
Viktor.