5.7.0 Authentication rejected

So this is the error I am getting:
smtp:tls:login://mx4.tba.net:587

220 mx4.tba.net ESMTP MSA MDaemon 19.5.5; Wed, 10 Jun 2020 01:27:37 +0200
EHLO jacobsenbygg.se
250-mx4.tba.net Hello jacobsenbygg.se [93.188.2.5], pleased to meet you
250-AUTH LOGIN CRAM-MD5 PLAIN
250-8BITMIME
250-ENHANCEDSTATUSCODES
250-STARTTLS
250 SIZE 61440000
STARTTLS
220 2.7.0 Ready to start TLS
EHLO jacobsenbygg.se
250-mx4.tba.net Hello jacobsenbygg.se [93.188.2.5], pleased to meet you
250-AUTH LOGIN CRAM-MD5 PLAIN
250-8BITMIME
250-ENHANCEDSTATUSCODES
250 SIZE 61440000
AUTH LOGIN
334 VXNlcm5hbWU6
aGVtc2lkYUBqYWNvYnNlbmJ5Z2cuc2U=
334 UGFzc3dvcmQ6
WWQ1VUZrdVpm
235 2.7.0 Authentication successful
MAIL FROM:<[email protected]>
250 2.1.0 Sender OK
RCPT TO:<[email protected]>
250 2.1.5 Recipient OK
DATA
354 Enter mail, end with <CRLF>.<CRLF>
X-Mailer: Postman SMTP 2.0.12 for WordPress (https://ww.wp.xz.cn/plugins/post-smtp/)
Content-Type: text/plain; charset=UTF-8
From: ” <[email protected]>
Sender: [email protected]
To: [email protected]
Reply-To: “‘[email protected]'” <[email protected]>
Message-Id: <[email protected]>
Subject: New Message From Jacobsenbygg – Skicka ett meddelande
Date: Tue, 09 Jun 2020 23:27:44 +0000
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
MIME-Version: 1.0

Namn: Filip=0D=0AEmail Adress: [email protected]=0D=0ATelefonnummer:=
015772353038=0D=0AAdress: asdasddas 1231=0D=0AMeddelande: This is going=
to work now 100%.
.
550 5.7.0 Authentication rejected

And this is how the support responded from the hosting company:
”
My guess is that our servers dont like different “from” and “sender”. Especcially since the account [email protected] dont exist as an account. Only [email protected] exists. So if you change the from adress to [email protected] it should work. ”

We have created another email and still the same error is there. But how to change the “FROM” email is my question?

The page I need help with: [log in to see the link]