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Re: [opennic-discuss] Unable To Create Membership With

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  • From: Sgiath <sgiath AT>
  • To: discuss AT
  • Subject: Re: [opennic-discuss] Unable To Create Membership With
  • Date: Sat, 31 Jul 2021 18:39:54 +0200

On 7/31/21 4:55 PM, Max Shenfield wrote:
Howdy! On Thursday 07/29, I attempted to sign up for an OpenNIC membership using my personal gmail account (shenfieldmax AT I did not receive a confirmation email. I tried going through the "Resend" flow, but that didn't resolve the issue. I triple checked my messages and Spam folder - I haven't received an email from OpenNIC on that account as of today (07/31). I immediately received a confirmation email when signing up using a address today, and successfully create an account that way. Not being able to sign up with a common email provider seems like a real issue, so wanted to bring it to your attention. Thanks, Max

Hi, I remember having issue registering with email on my private mail server. Ultimately I had to whitelist `` and
`` in Postfix to get it working.

It wasn't passing my `smtpd_helo_restrictions`:


It was a while ago so I don't remember exactly which. Anyway there is definitely something non-standard with OpenNIC email servers which may cause some email servers reject the messages. OpenNIC is the only legitimate sender which I had to whitelist - all other mail servers are working with my config without issues.

Have a nice day
GPG: 0x70F9C7DE34CB3BC8

Why is HTML email a security nightmare? See

Attachment: OpenPGP_0x70F9C7DE34CB3BC8.asc
Description: OpenPGP public key

Attachment: OpenPGP_signature
Description: OpenPGP digital signature

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