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$ >
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