CiviCRM 5.14.0 I am using the Sparkpost extension This is a new site in testing phase

I have set my from email address to be: "Site Administrator" This domain has been verified by Sparkpost and is a working mailbox.

If I set up a mailing and click on Track Replies in the response tab, I get this message:

The "Track Replies" option conflicts with the "Reply-To" option. The "Reply-To" option has been disabled.

I assume that this is just a warning that the system will not use the "From" email address for the reply.

When the recipient clicks reply in the email client, the reply address looks like this:

[email protected]

This address obviously does not exist on in my Postfix virtual_users table. I also believe it should be [email protected] and use the domain of the From address.

I changed the reply address to [email protected] and got this error.

An error occurred while sending mail. The mail server responded:  
5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table.
 Please check the message recipient "[email protected]" and try again.

Now, ccrmmail.vietfeir.com is a CNAME that points to sparkpostmail.com but it is still being rejected by my Postfix server.

I'm not sure what to do to fix this.

1 Answer 1


I changed the address to include a local part so VERP. This now works

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