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Enforce TLS

If your organization is required to use TLS for email sent to recipients in specific domains, you can configure outbound email to ensure that TLS (Transport Layer Security) is used for those domains. Enforced TLS forces a secure connection between both the sending and receiving domains. If a secure connection cannot be established, the mail is not sent.


like https://www.ibm.com/support/knowledgecenter/en/SSPS94/hybrid/topics/cfg_using_enforced_tls_t.html

  • Guest
  • Jul 31 2018
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  • Guest commented
    5 Dec, 2018 04:27pm

    Yes, please make it possible to enforce TLS for specific domains only. Additional option on the Foreign smtp document? 

  • Guest commented
    26 Sep, 2018 09:15am

    If I understand my customer regarding the requirements by law or regulatory (GDPR), it could be a 1st step to have an indicator that documented that a mail send with "TLS". A customer must prove that TLS (Transport Layer Security) is used for their domains.

  • Guest commented
    7 Aug, 2018 03:34pm

    RouterFallbackNonTLS=1 Is the solution?

  • Guest commented
    7 Aug, 2018 04:18am

     I agree with "Guest commented August 6, 2018 13:52". On the one side there are requirements by law or regulatory (e.g. GDPR) to enforce TLS encryption to specific domains. On the other side several other domains are not using TLS in any way (in our environment 1/4 of external sent mail is without TLS/SSL).

    We need a way to force TLS for some domains and leave it as opportunistic for the rest of the world.

  • Guest commented
    6 Aug, 2018 01:52pm

    Hello Thomas, what I believe is meant here - at least this understanding of the idea is the reason, why I support it: Yes, when TLS negotiation is enabled, the server should be using the strongest security available. But what if I what to make absolutely sure? I'd have to enforce TLS. When I do that, I would forbid any emailing to or from servers which may be to old or poorly maintained for example private servers of customers (eg bank to customer). I would possibly loose business.

    On the other hand, I might have some partners/customers etc., I could talk to in case TLS fails for some reason while sending or receiving mails.

    I would like to:

    Negotiate TLS for all senders and addressees, I do not know well and

    Enforce TLS for all senders and addressees, I can coordinate with to enhance security.

    Domino does not give this option. Why not make it possible to set such an option in the documents for "Foreign SMTP domain"?

  • Admin
    Thomas Hampel commented
    6 Aug, 2018 01:42pm

    By default a new server should be using the latest / strongest security settings.

  • Guest commented
    2 Aug, 2018 08:35am

    I think you mean that you wanted to specify the recipient domain ? How is the recipient classified on that banking requirement, all email sent between banking institution / all email sent to customer ?

    I hope it does not simply say all email correspondence going out of the company must be in TLS ?

  • Guest commented
    2 Aug, 2018 06:26am

    I can confirm the request. I have also met to either email via TLS or nothing.

  • Guest commented
    1 Aug, 2018 11:11am

    This is, what can be done today. But there are requirements in the banking sector saying, "TLS, and nothing but TLS". If TLS is not possible, then e-mal will not be delivered. 
    The feature should allow to specify the sending domains , of course

  • Guest commented
    31 Jul, 2018 02:06pm

    I personally would rather have it downgrade gracefully if the other side somehow does not use TLS. Please bear in mind that as a company we simply cannot force the party that we correspond with to adhere to our standard.