You're welcome. It's good that your systems are running well again.
It's just as well that you've moved away from those IP addresses
because one of them is blacklisted:
https://app.abusix.com/lookup/results?q=150.105.124.167
If your systems caused it, I suspect you'll want to find out why.
Good luck!
> Allow me to start by thanking you all for the feedback and understanding!
>
> We currently use only 2 IPs which do have PTRsconfigured:
> 150.105.124.166-167. I referred to the full /24 range in case more were
> needed.
>
> As the heat wave subsides, we have returned the email flow back to its
> regular IPs of origins ( 165.251.169.11-12).
>
> Once again, thank you so very much for the support and attention!
>
> Regards,
> Carla Saldanha
> Email Deliverability @ OpenText
>
>
> ________________________________
> From: Mark Stone <[email protected]>
> Sent: Saturday, May 30, 2026 17:34
> To: [email protected] <[email protected]>
> Cc: [email protected] <[email protected]>; Email Deliverability
> <[email protected]>
> Subject: [EXTERNAL] - Re: [mailop] Please be aware the needed Volume increase
> in range 150.105.124.0/24.
>
> CAUTION: This email originated from outside of the organization. Do not click
> links or open attachments unless you recognize the sender and know the
> content is safe. If you feel that the email is suspicious, please report it
> using PhishAlarm.
>
>
> I can confirm that we drop connections from MTAs with no PTR record.
>
> -- _________________________________________________________________
> L. Mark Stone, Founder
>
> North America's Leading Zimbra VAR/BSP/Training Partner
> For Companies With Mission-Critical Email Needs
> Winner of the Zimbra Americas VAR Partner of the Year - Two Years Running!
>
> On Friday, May 29th, 2026 at 4:59 PM, Randolf Richardson, Postmaster via
> mailop <[email protected]> wrote:
>
> > Your /24 is not in any of our blacklists (this is good).
> >
> > I spotchecked a few IP addresses in your netblock, and it seems that
> > none of them have FCrDNS configured -- I'm getitng NXDOMAIN.
> >
> > I suggest checking on this because mail will be rejected by a lot of
> > SMTP servers if the IP addresses you're sending from aren't properly
> > configured with PTR records in the relevant in-addr.arpa zone.
> >
> > > Hello to all, good day!
> > >
> > > We're having issues with a DC (due to the heat wave in Europe) and
> > > therefore, are migrating email flows to a different one using the range
> > > in subject!
> > >
> > > Thank you so much in advance for applying some flexibility and technical
> > > "patience" if you see us blasting your way, it will be truly appreciated
> > >
> > >
> > > Regards,
> > > Carla Saldanha
> > > Email Deliverability @ OpenText
> > >
> > >
> >
> >
> > --
> > Postmaster - [email protected]
> > Randolf Richardson, CNA - [email protected]
> > Inter-Corporate Computer & Network Services, Inc.
> > Vancouver, Beautiful British Columbia, Canada
> > https://urldefense.com/v3/__https://www.inter-corporate.com/__;!!Obbck6kTJA!ahVyVaKq_Pe-NJyHI95o8PGIWOguGavFWbJhvHhs8s_lHGRhKFj-Lu9sI55FqpXxNurs4Co1cR7gKUNAt5s1R6jDFrq4jHPi1HuuB7Z-$
> >
> >
> > _______________________________________________
> > mailop mailing list
> > [email protected]
> > https://urldefense.com/v3/__https://list.mailop.org/listinfo/mailop__;!!Obbck6kTJA!ahVyVaKq_Pe-NJyHI95o8PGIWOguGavFWbJhvHhs8s_lHGRhKFj-Lu9sI55FqpXxNurs4Co1cR7gKUNAt5s1R6jDFrq4jHPi1D9TV2kq$
> >
>
--
Postmaster - [email protected]
Randolf Richardson, CNA - [email protected]
Inter-Corporate Computer & Network Services, Inc.
Vancouver, Beautiful British Columbia, Canada
https://www.inter-corporate.com/
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