Help with new mailscanner install w/ sendmail CentOS7

[Jerry Benton]

You can also implement SRS on your server.
https://en.wikipedia.org/wiki/Sender_Rewriting_Scheme


-
Jerry Benton
www.mailborder.com
+1 - 844-436-6245


-----Original Message-----
From: Peter Lemieux <mailscanner at replies.cyways.com>
Reply: MailScanner Discussion <mailscanner at lists.mailscanner.info>
Date: November 4, 2016 at 11:24:24 AM
To: MailScanner Discussion <mailscanner at lists.mailscanner.info>
Subject:  Re: Help with new mailscanner install w/ sendmail CentOS7

> This is something that Microsoft implemented for accounts using their hosted
> mail services without thinking about the effects it might have on
> listservers. They are following in the "august" footsteps of Yahoo and AOL
> whose implementation of DMARC has also caused serious problems for
> listserver administrators.
>
> This list, like the ones I manage, puts the sender's From address in the
> headers rather than using a generic one like owner-listname at example.com.
> Microsoft has now chosen to view all messages where the From address matches
> the recipient's address as "spoofed." This policy only affects the copy of
> the message being sent back to you. Other subscribers will see the message
> when redistributed by the listserver.
>
> Microsoft clearly refuses to believe the SPF record even when it indicates
> that the sending server is legitimate. I'm seeing this problem occur on the
> lists I manage despite having correct SPF data in my DNS.
>
> You can look into methods of whitelisting the sending server or sending
> domain, in this case lists.mailscanner.info. I've seen one complaint at
> http://answers.microsoft.com/en-us/msoffice/forum/msoffice_o365admin-mso_other/listserv-messages-fail-o365s-fraud-detection/7ab75018-43fc-4d9e-b716-85f7f2418d3c.
> The reply from the Microsoft support person shows they are entirely
> clueless about why this policy affects listservers.
>
> I dealt with the Yahoo and AOL problems by rewriting the sender's address so
> it reads
> someone=yahoo.com at lists.example.com
> That passes the DMARC tests since the message originates on the legitimate
> server for lists.example.com. I hope not to have to add Outlook and company
> to the list of domains for which I do rewriting, but I suspect it may come
> to that.
>
> Google and GMail also treat messages where the From and To are identical as
> likely spam. I've had to tell my subscribers using those services to look
> in their spam folders when they don't see their postings to my listserver in
> their inboxes.
>
> Peter
>
>
> On 11/03/2016 07:45 PM, Jerry Benton wrote:
> > Maybe Mark can provide more info when he has time.
> >
> >
> > On Thursday, November 3, 2016, Paul Scott > > > wrote:
> >
> > Hello Jerry. Interesting. I see this message coming back on each send:____
> >
> > __ __
> >
> >
> >
> > This sender failed our fraud detection checks and may not be who they appear to be. Learn
> about spoofing
> > ____
> >
> > __ __
> >
> > __ __
> >
> > Not sure why.____
> >
> > __ __
> >
> > Paul Scott____
> >
> > __ __
> >
> > __ __
> >
> > *From:*MailScanner [mailto:mailscanner-bounces+sales
> > <_e(%7B%7D,'cvml','mailscanner-bounces%2Bsales');>=edenusa.com at lists.mailscanner.info
> > <_e(%7B%7D,'cvml','edenusa.com at lists.mailscanner.info');>]
> > *On Behalf Of *Jerry Benton
> > *Sent:* Thursday, November 03, 2016 4:40 PM
> > *To:* MailScanner Discussion > > <_e(%7B%7D,'cvml','mailscanner at lists.mailscanner.info');>>
> > *Subject:* Re: Help with new mailscanner install w/ sendmail CentOS7____
> >
> > __ __
> >
> > I see the email you sent.____
> >
> > -____
> >
> > Jerry Benton____
> >
> > www.mailborder.com ____
> >
> > +1 844-436-6245 ext 707____
> >
> > sent via mobile____
> >
> >
> > On Nov 3, 2016, at 19:37, Paul Scott > > <_e(%7B%7D,'cvml','sales at edenusa.com');>> wrote:____
> >
> > The MailScanner Discussion list is now rejecting me. Any idea why?
> >
> > -----Original Message-----
> > From: MailScanner
> > [mailto:mailscanner-bounces+sales=edenusa.com at lists.mailscanner.info
> > <_e(%7B%7D,'cvml','mailscanner-bounces%2Bsales%5Cx3dedenusa.com at lists.mailscanner.info');>]
> > On Behalf Of Mark Sapiro
> > Sent: Thursday, November 03, 2016 8:48 AM
> > To: mailscanner at lists.mailscanner.info
> > <_e(%7B%7D,'cvml','mailscanner at lists.mailscanner.info');>
> > Subject: Re: Help with new mailscanner install w/ sendmail CentOS7
> >
> > On 11/02/2016 10:11 PM, Daniel Cole wrote:
> >
> > ____
> >
> > __ __
> >
> > I believe the issue is that Sendmail is not configured to run
> > separate ____
> >
> > for inbound and outbound as per
> > https://www.mailscanner.info/sendmail/
> > ​.____
> >
> > If I send mail I can see that sendmail is processing it (and it
> > gets ____
> >
> > delivered as expected), but MailScanner doesnt touch it.____
> >
> > __ __
> >
> > __ __
> >
> > The details on that page dont quite match up wit systemd on
> > CentOS 7.____
> >
> > Can anyone point me in the right direction please?____
> >
> >
> >
> > The information in the issue at
> > > > > may help.
> >
> > --
> > Mark Sapiro > > <_e(%7B%7D,'cvml','mark at msapiro.net');>> The
> > highway is for gamblers,
> > San Francisco Bay Area, California better use your sense - B. Dylan
> >
> >
> > --
> > MailScanner mailing list
> > mailscanner at lists.mailscanner.info
> > <_e(%7B%7D,'cvml','mailscanner at lists.mailscanner.info');>
> > http://lists.mailscanner.info/mailman/listinfo/mailscanner
> >
> >
> >
> >
> > --
> > MailScanner mailing list
> > mailscanner at lists.mailscanner.info
> > <_e(%7B%7D,'cvml','mailscanner at lists.mailscanner.info');>
> > http://lists.mailscanner.info/mailman/listinfo/mailscanner
> > ____
> >
> >
> >
> > --
> >
> > --
> > Jerry Benton
> > Mailborder Systems
> > www.mailborder.com
> >
> >
> >
> >
> >
>
>
> --
> MailScanner mailing list
> mailscanner at lists.mailscanner.info
> http://lists.mailscanner.info/mailman/listinfo/mailscanner
>
>