Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:122465
Date: Thu, 22 Feb 2024 16:46:04 +0000 (GMT)
To: Alain D D Williams <addw@phcomp.co.uk>
cc: internals@lists.php.net
Subject: Re: [PHP-DEV] What's up with emails?
In-Reply-To: <ZddoQuJqt_Jv433A@phcomp.co.uk>
Message-ID: <2486f691-ab5b-fe67-4d27-fbc850c1cf99@php.net>
References: <CAPzBOBMKL_70sQkM_DrfFSaJz-ustCEhF5pTZP-wee+ceh46ag@mail.gmail.com> <DF2009FC-C510-4E0D-ADF8-CDCA7AB84AA6@php.net> <ZddoQuJqt_Jv433A@phcomp.co.uk>
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From: derick@php.net (Derick Rethans)

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On Thu, 22 Feb 2024, Alain D D Williams wrote:

> On Thu, Feb 22, 2024 at 09:05:22AM -0500, Derick Rethans wrote:
>
>> Gmail is rejecting emails after we moved the servers without telling us why, in enough detail to do anything about it.
>
> I run other mail lists and have had similar problems with gmail recently.
>
> The problem seems to be SPF. This says which IP addresses can be used for
> sending email for particular domains. gmail has recently become much stricter.
>
> List emails are sent from php-smtp4.php.net (45.112.84.5).
>
> However the 'From' address is still that of the original sender -- which is OK
> for the email that I am replying to as it is
> 	From: Derick Rethans <derick@php.net>
>
> and the MX for php.net is php-smtp4-ip4.php.net. which has address 45.112.84.5
>
> However I suspect that *this* email (the one that I am typing now) will get
> bounced by gmail as my address is: addw@phcomp.co.uk and 45.112.84.5 is not
> allowed (by SPF) to send email for phcomp.co.uk.
>
> So: how to fix ?
>
> Make the From: address internals@lists.php.net

We don't want to change the From address, as that means that replies go 
to the list, rather than the original sender. We never had to do any of 
that before.

> The envelope address is already, something like
> internals+bounces-122457-addw=phcomp.co.uk@lists.php.net
>
> This means a fix to whatever list processor that you are using.
>
> Other recommendations:
>
> • MX for lists.php.net is php-smtp4-ip4.php.net.
> Change to php-smtp4.php.net.

Done

> • SPF for lists.php.net is "v=spf1 a mx a:osu1php.osuosl.org. ip4:45.112.84.5 ip6:2a02:cb43:8000::1102"
> Change to "v=spf1 a mx -all"

Done, but I kept it as ~all.

> •• osu1php.osuosl.org. does not seem to exist - so zap it

Done

> •• If you make the MX change that I suggest then the
> following are redundant: ip4:45.112.84.5 ip6:2a02:cb43:8000::1102

Done

> •• -all means no other addresses accepted. gmail started making that implicit in
> the last few months, it is this that is causing the current problems.

I've added ~all instead.

> Once that has settled down you should enable sending email from (& 
> thus to) IPv6 addresses. This is the way that the world is moving. It 
> is not hard.

Done that now too.

Fingers crossed to see if any of this is helping.

cheers,
Derick
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