WordPress@mydomain.com on behalf of

Hey,

When I use Postman without SMTP enabled and set the From email as no.reply@mydomain.com, the receiver gets wordpress@mydomain.com; on behalf of; No-Reply <no.reply@mydomain.com>. My hosting provider says “You are seeing that because your email application is setting the MAIL FROM:<wordpress@mydomain.com>, then assigning RCPT TO:<noreply@mydomain.com>”.

Any ideas who to resolve this?

Header
————–
From: No Reply <no.reply@mydomain.com>
To: jim@externalpersonsdomain.com
Bcc: bob@externalpersonsdomain.com
Date: 2016-06-11 17:57:56
Subject: Test Message
Delivery-URI: smtp:none:none://localhost:25
————–

Trace
————-
220-s4.supportedns.com ESMTP Exim 4.87 #1 Sat, 11 Jun 2016 01:57:56 -0400
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
EHLO localhost
250-s4.supportedns.com Hello localhost [::1]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
MAIL FROM:<wordpress@mydomain.com>
250 OK
RCPT TO:<jim@externalpersonsdomain.com>
250 Accepted
RCPT TO:<bob@externalpersonsdomain.com>
250 Accepted
DATA
354 Enter message, ending with “.” on a line by itself
X-Mailer: Postman SMTP 1.7.2 for WordPress (https://wordpress.org/plugins/postman-smtp/)
From: “No Reply” <no.reply@mydomain.com>
Sender: wordpress@mydomain.com
To: jim@externalpersonsdomain.com
Subject: Test Message
Date: Sat, 11 Jun 2016 05:57:56 +0000
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
MIME-Version: 1.0
————–

Thanks!
Andrew