Message rejected under suspicion of SPAM

Hello, I can’t send message through my Contact Form…

The error:
2020-08-21 20:32:40 CLIENT -> SERVER: QUIT
2020-08-21 20:32:40 SERVER -> CLIENT: 221 2.0.0 Closing connection.
2020-08-21 20:32:40 Connection: closed

Can you help me?

Below I copied a part of the log.

Versions:
WordPress: 5.5
WordPress MS: No
PHP: 7.2.33-1+0~20200807.47+debian9~1.gbpcb3068
WP Mail SMTP: 2.3.1

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: [2] Message rejected under suspicion of SPAM; https://ya.cc/1IrBc 1598041960-4mJiQ51YxY-Wdm4pfBA
SMTP code: 554 Additional SMTP info: 5.7.1
Host: smtp.yandex.com
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.1.1g 21 Apr 2020

Debug:
Mailer: Other SMTP
SMTP Error: data not accepted.

SMTP Debug:
2020-08-21 20:32:38 Connection: opening to ssl://smtp.yandex.com:465, timeout=300, options=array()

2020-08-21 20:32:38 Connection: opened

2020-08-21 20:32:38 SERVER -> CLIENT: 220 vla3-3dd1bd6927b2.qloud-c.yandex.net ESMTP (Want to use Yandex.Mail for your domain? Visit https://pdd.yandex.ru)

2020-08-21 20:32:38 CLIENT -> SERVER: EHLO patrick.pro.br

2020-08-21 20:32:39 SERVER -> CLIENT: 250-vla3-3dd1bd6927b2.qloud-c.yandex.net250-8BITMIME250-PIPELINING250-SIZE 42991616250-AUTH LOGIN PLAIN XOAUTH2250-DSN250 ENHANCEDSTATUSCODES

2020-08-21 20:32:39 CLIENT -> SERVER: AUTH LOGIN

2020-08-21 20:32:39 SERVER -> CLIENT: 334 VXNlcm5hbWU6

2020-08-21 20:32:39 CLIENT -> SERVER: [credentials hidden]

2020-08-21 20:32:39 SERVER -> CLIENT: 334 UGFzc3dvcmQ6

2020-08-21 20:32:39 CLIENT -> SERVER: [credentials hidden]

2020-08-21 20:32:39 SERVER -> CLIENT: 235 2.7.0 Authentication successful.

2020-08-21 20:32:39 CLIENT -> SERVER: MAIL FROM:<[email protected]>

2020-08-21 20:32:39 SERVER -> CLIENT: 250 2.1.0 <[email protected]> ok

2020-08-21 20:32:39 CLIENT -> SERVER: RCPT TO:<[email protected]>

2020-08-21 20:32:39 SERVER -> CLIENT: 250 2.1.5 <[email protected]> recipient ok

2020-08-21 20:32:39 CLIENT -> SERVER: DATA

2020-08-21 20:32:39 SERVER -> CLIENT: 354 Enter mail, end with “.” on a line by itself

2020-08-21 20:32:39 CLIENT -> SERVER: Date: Fri, 21 Aug 2020 20:32:38 +0000

2020-08-21 20:32:39 CLIENT -> SERVER: To: [email protected]

2020-08-21 20:32:39 CLIENT -> SERVER: From: =?UTF-8?Q?=E2=96=B2_Patrick=2Epro=2Ebr?= <[email protected]>

2020-08-21 20:32:39 CLIENT -> SERVER: Subject: WP Mail SMTP: HTML Test email to [email protected]

2020-08-21 20:32:39 CLIENT -> SERVER: Message-ID: <[email protected]>

2020-08-21 20:32:39 CLIENT -> SERVER: X-Mailer: WPMailSMTP/Mailer/smtp 2.3.1

2020-08-21 20:32:39 CLIENT -> SERVER: X-Mailer-Type: WPMailSMTP/Admin/Test

2020-08-21 20:32:39 CLIENT -> SERVER: MIME-Version: 1.0

2020-08-21 20:32:39 CLIENT -> SERVER: Content-Type: text/html; charset=UTF-8

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