Re: [mailop] Different From domain and Reply-To domain

[Bill Cole]

On 8 Dec 2017, at 14:56 (-0500), Bryan Bradsby wrote:


We have a fair number of clients who do this today and they don't 
experience any deliverability
or filtering issues that we would attribute to having a different
reply-to. If you were to start filtering based on that, you'd be an
outlier.


Spamassassin adds points for that.


This is not generally true for the current default SpamAssassin ruleset. 
There are rules based on mismatched From/Reply-to domains but all of 
them depend on at least one of the domains being in the SA list of 
freemail domains.


--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Currently Seeking Steady Work: https://linkedin.com/in/billcole

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Re: [mailop] Different From domain and Reply-To domain

[Bryan Bradsby]

> We have a fair number of clients who do this today and they don't 
> experience any deliverability
> or filtering issues that we would attribute to having a different
> reply-to. If you were to start filtering based on that, you'd be an
> outlier.

Spamassassin adds points for that. Perhaps it's not enough to tip the
threshold for your customers. 

-bryan

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Re: [mailop] Different From domain and Reply-To domain

[Ted Cooper]

On 08/12/17 01:17, Ken O'Driscoll wrote:
> On Thu, 2017-12-07 at 14:50 +0100, David Hofstee wrote:
>> Hi,
>>
>> Can people here share their experience (or spamfilter configuration) with
>> differing 5322.From and 5322.Reply-To domains in larger volumes of
>> email?
> 
> Completely agree with Vladimir and Al, it's common practice.
> 
> The only exception I can think of, is if the reply-to was a freemail
> address. And, even then, you couldn't 100% assume the mail is bad because
> legitimate users can use email in strange ways.

Website contact forms also need to use the reply-to instead of from
address when sending email to the site owner. The from address is the
site, but the reply-to is set to the contact form user's address so that
a simply reply ends up in the correct location.



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Re: [mailop] Different From domain and Reply-To domain

[Grant Taylor via mailop]

On 12/07/2017 06:50 AM, David Hofstee wrote:
Can people here share their experience (or spamfilter 
configuration) with differing 5322.>From and 5322.Reply-To domains in 
larger volumes of email? Is it a problem, if so, where? If it is a 
problem, are there requirements so that legitimate email is accepted?


I would argue against filtering based on discrepancies against the 
5322.From and 5322.Reply-To headers.


I used to advise customers to have website contact us forms send the 
mail with a 5322.From email address they controlled with the 
5322.Reply-To being the purported address as provided by the person 
filling out the form.  -  This allowed the contact us forms to safely 
send emails without violating any hygiene tests (at the time).  -  I 
believe the same methodology would work now with SPF / DKIM / DMARC.




--
Grant. . . .
unix || die



smime.p7s
Description: S/MIME Cryptographic Signature
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Re: [mailop] Different From domain and Reply-To domain

[Al Iverson]

Where I see freemail addresses in the reply-to in valid mail is in
various mailing list platforms, ones that work around DMARC blocking
by rewriting the from, then moving the original poster's email address
to the reply-to, to allow for off-list replies. Not so much that I'm
looking to argue whether or not this is valid or really common or
should be allowed, just saying that I see it today. :)

On Thu, Dec 7, 2017 at 10:17 AM, Ken O'Driscoll  wrote:
> On Thu, 2017-12-07 at 14:50 +0100, David Hofstee wrote:
>> Hi,
>>
>> Can people here share their experience (or spamfilter configuration) with
>> differing 5322.From and 5322.Reply-To domains in larger volumes of
>> email?
>
> Completely agree with Vladimir and Al, it's common practice.
>
> The only exception I can think of, is if the reply-to was a freemail
> address. And, even then, you couldn't 100% assume the mail is bad because
> legitimate users can use email in strange ways.
>
> Ken.
>
> --
> Ken O'Driscoll / We Monitor Email
> t: +353 1 254 9400 | w: www.wemonitoremail.com
>
> Need to understand deliverability? Now there's a book:
> www.wemonitoremail.com/book
>
>
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-- 
al iverson // wombatmail // miami
http://www.aliverson.com
http://www.spamresource.com

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Re: [mailop] Different From domain and Reply-To domain

[Ken O'Driscoll]

On Thu, 2017-12-07 at 14:50 +0100, David Hofstee wrote:
> Hi,
> 
> Can people here share their experience (or spamfilter configuration) with
> differing 5322.From and 5322.Reply-To domains in larger volumes of
> email?

Completely agree with Vladimir and Al, it's common practice.

The only exception I can think of, is if the reply-to was a freemail
address. And, even then, you couldn't 100% assume the mail is bad because
legitimate users can use email in strange ways.

Ken.

-- 
Ken O'Driscoll / We Monitor Email
t: +353 1 254 9400 | w: www.wemonitoremail.com

Need to understand deliverability? Now there's a book:
www.wemonitoremail.com/book


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Re: [mailop] Different From domain and Reply-To domain

[Al Iverson]

Yeah, lots of ESPs, list management tools, and ticketing systems can
be and often are configured to use a different reply-to address,
sometimes in a totally different domain. We have a fair number of
clients who do this today and they don't experience any deliverability
or filtering issues that we would attribute to having a different
reply-to. If you were to start filtering based on that, you'd be an
outlier.

On Thu, Dec 7, 2017 at 9:21 AM, Vladimir Dubrovin via mailop
 wrote:
>
> You should never do it, having different e-mails in From: and Reply-To,
> including ones from different domains, is a common practice. E.g., mailing
> lists like this can change From or Reply-To, most probably the message you
> read right now has From and Reply-To from different domains.
>
> 07.12.2017 16:50, David Hofstee пишет:
>
> Hi,
>
> Can people here share their experience (or spamfilter configuration) with
> differing 5322.From and 5322.Reply-To domains in larger volumes of email? Is
> it a problem, if so, where? If it is a problem, are there requirements so
> that legitimate email is accepted?
>
> Any info and opinions on this is appreciated. Obviously, my customer is
> owner of the two domains. His customer care is done by a holding company.
> One can say there is a legitimate reason. I'm just looking if this is a
> possible cause of problems, or not.
>
> Yours,
>
>
> David
>
>
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>
> --
> Vladimir Dubrovin
> @Mail.Ru
>
>
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>



-- 
al iverson // wombatmail // miami
http://www.aliverson.com
http://www.spamresource.com

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Re: [mailop] Different From domain and Reply-To domain

[Vladimir Dubrovin via mailop]

You should never do it, having different e-mails in From: and Reply-To,
including ones from different domains, is a common practice. E.g.,
mailing lists like this can change From or Reply-To, most probably the
message you read right now has From and Reply-To from different domains.

07.12.2017 16:50, David Hofstee пишет:
> Hi,
>
> Can people here share their experience (or spamfilter
> configuration) with differing 5322.From and 5322.Reply-To domains in
> larger volumes of email? Is it a problem, if so, where? If it is a
> problem, are there requirements so that legitimate email is accepted?
>
> Any info and opinions on this is appreciated. Obviously, my customer
> is owner of the two domains. His customer care is done by a holding
> company. One can say there is a legitimate reason. I'm just looking if
> this is a possible cause of problems, or not.
>
> Yours,
>
>
> David
>
>
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-- 
Vladimir Dubrovin
@Mail.Ru

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[mailop] Different From domain and Reply-To domain

[David Hofstee]

Hi,

Can people here share their experience (or spamfilter configuration) with
differing 5322.From and 5322.Reply-To domains in larger volumes of
email? Is it a problem, if so, where? If it is a problem, are there
requirements so that legitimate email is accepted?

Any info and opinions on this is appreciated. Obviously, my customer is
owner of the two domains. His customer care is done by a holding company.
One can say there is a legitimate reason. I'm just looking if this is a
possible cause of problems, or not.

Yours,


David
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