[Mailman-Users] mailman postfix connection on debian

[John Griessen]

On 05/21/2016 06:28 PM, John Griessen wrote:
> Try setting
>
> VERP_CONFIRMATIONS = Yes
>
> in mm_cfg.py. this will make the message have
>
> Reply-To: catjuggling-confirm+<<long_hex_string>@cibolo.us
> Subject: Your confirmation is required to join the catjuggling mailing list
>
> That may help.

That works when I do a list mass subscription invite, reply via smtp.sendgrid.net,
otherwise sendgrid.net silently drops it, and I don't
even see it in bounce logs when logged into sendgrid.net.

So sendgrid.net is anti mailman.
Sendgrid.net is a consolidator like we are seeing so many of in web services vs. DIY internet
servers operated by people like us.  Could be bad for DIY internet.