DKIM header being stripped

Problem reported by Speednet - 8/17/2026 at 11:41 AM

Submitted

I am having a problem with a DKIM header that I generate and send through SmarterMail: It is being stripped from the message.

This is different than having signing enabled in the options. I am able to use DKIM by enabling signing within SmarterMail, but I want to be able to do my own signing and validate with my own header, rather than using the SmarterMail option.

I tried sending both authenticated and non-authenticated, and both strip the header before sending.

Internal e-mails, meaning e-mails in which the recipient lives on the same server (different domain, same server), the DKIM header survives. But when sent to an address that does not live on the server, it strips the header.

I am using SmarterMail Enterprise 9693 (Jul 16, 2026).

4 Replies

Reply to Thread

Speednet Replied

8/18/2026 at 8:13 AM

Should I have filed a support ticket instead?

Kyle Kerst Replied

8/18/2026 at 10:51 AM

Employee Post

A support ticket may be your best bet so we can do some testing on this directly. Do you use a specific app to sign those messages or are you doing that programmatically?

Kyle Kerst

Lead Internal Network/System Administrator

SmarterTools Inc.

smartertools.com

Speednet Replied

8/18/2026 at 12:37 PM

Thanks Kyle. I'm doing it programmatically. I'll put through a support request.

Kyle Kerst Replied

8/19/2026 at 11:00 AM

Employee Post

Sounds good @Speednet and you're very welcome. With a ticket we may be able to have you provide a sample/script we can use to replicate the issue here, that'll go a long way in getting it resolved.

Kyle Kerst

Lead Internal Network/System Administrator

SmarterTools Inc.

smartertools.com

Back to Community Threads

Reply to Thread

Enter the verification text