James B. Byrne
2017-Jun-16 21:37 UTC
[asterisk-users] OT: Explain where mailing list bouncing comes from ?
On Fri, June 16, 2017 12:28, Tim S wrote:
Whether it is intentional or not these messages railing against the
list operators has a decided tone of condescension which is not
warranted. The fact of the matter is that DMARC is broken by design
and the unpleasant effects that adoption of it has on mailing-list
traffic were well hashed out on the ITEF mailing lists before it was
adopted anyway. What was predicted there has come to pass.
DMARC conflicts with the existing SMTP RFCs in several ways, none of
which I will elaborate here but all of which may be discovered by
perusing the relevant threads on the ITEF mailing lists. Some mailing
list management software, notably Mailman, since has been modified to
'work around' the problems with DMARC if so configured by the list
owners. But only at the cost of violating the SMTP RFCs themselves.
Do not take my word for it. Raise these issues on the Postfix mailing
list and discover what response you get from Viktor and Wietse.
The driving force behind DMARC was YAHOO's shoddy security of their
own users' accounts. With Hotmail and similar ilk close behind. It is
a completely inappropriate, and in my opinion ill-thought-out,
technical solution to what is essentially an internal security problem
at some email providers, albeit very large ones. In general it is an
example of what is called 'externalising your costs'.
The appropriate answer has been provided: lose the
gmail/hotmail/yahoo/freemail account and administer your own domain
for personal email. Configure the spf and dkim settings on your own
domain as required to suit your needs and not those of someone else.
--
*** e-Mail is NOT a SECURE channel ***
Do NOT transmit sensitive data via e-Mail
Do NOT open attachments nor follow links sent by e-Mail
James B. Byrne mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
Marcelo Terres
2017-Jun-17 15:14 UTC
[asterisk-users] OT: Explain where mailing list bouncing comes from ?
Yes, let's stop to use our gmail accounts because JUST THE DIGIUM MAILING LIST is bouncing. All other mailman servers must be wrongly configured, and the Digium server is the only one that is correct. Perfect! :-D Marcelo H. Terres <mhterres at gmail.com> IM: mhterres at jabber.mundoopensource.com.br https://www.mundoopensource.com.br https://twitter.com/mhterres https://linkedin.com/in/marceloterres On 16 June 2017 at 22:37, James B. Byrne <byrnejb at harte-lyne.ca> wrote:> > On Fri, June 16, 2017 12:28, Tim S wrote: > > Whether it is intentional or not these messages railing against the > list operators has a decided tone of condescension which is not > warranted. The fact of the matter is that DMARC is broken by design > and the unpleasant effects that adoption of it has on mailing-list > traffic were well hashed out on the ITEF mailing lists before it was > adopted anyway. What was predicted there has come to pass. > > DMARC conflicts with the existing SMTP RFCs in several ways, none of > which I will elaborate here but all of which may be discovered by > perusing the relevant threads on the ITEF mailing lists. Some mailing > list management software, notably Mailman, since has been modified to > 'work around' the problems with DMARC if so configured by the list > owners. But only at the cost of violating the SMTP RFCs themselves. > Do not take my word for it. Raise these issues on the Postfix mailing > list and discover what response you get from Viktor and Wietse. > > The driving force behind DMARC was YAHOO's shoddy security of their > own users' accounts. With Hotmail and similar ilk close behind. It is > a completely inappropriate, and in my opinion ill-thought-out, > technical solution to what is essentially an internal security problem > at some email providers, albeit very large ones. In general it is an > example of what is called 'externalising your costs'. > > The appropriate answer has been provided: lose the > gmail/hotmail/yahoo/freemail account and administer your own domain > for personal email. Configure the spf and dkim settings on your own > domain as required to suit your needs and not those of someone else. > > -- > *** e-Mail is NOT a SECURE channel *** > Do NOT transmit sensitive data via e-Mail > Do NOT open attachments nor follow links sent by e-Mail > > James B. Byrne mailto:ByrneJB at Harte-Lyne.ca > Harte & Lyne Limited http://www.harte-lyne.ca > 9 Brockley Drive vox: +1 905 561 1241 > Hamilton, Ontario fax: +1 905 561 0757 > Canada L8E 3C3 > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > Check out the new Asterisk community forum at: https://community.asterisk.org/ > > New to Asterisk? Start here: > https://wiki.asterisk.org/wiki/display/AST/Getting+Started > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users