Domain Name: Post SMTP email error

Thanks

Here is a failed one from the log, (which I can see is a spam email) – followed by the info you requested.

This is the conversation between Postman and the mail server. It can be useful for diagnosing problems. DO NOT post it on-line, it may contain your account password.

smtps:plain://hypno-oncology.com:465

220-ams20.stablehost.com ESMTP Exim 4.93 #2 Thu, 08 Apr 2021 07:12:31 +0000 
220-We do not authorize the use of this system to transport unsolicited, 
220 and/or bulk e-mail.
EHLO releasehypnotherapy.com
250-ams20.stablehost.com Hello releasehypnotherapy.com [198.20.108.28]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250 HELP
AUTH PLAIN
334 
AGh5cG5vb25jAGswIXZtNDVUSFE7eks5
235 Authentication succeeded
MAIL FROM:<[email protected]>
250 OK
RCPT TO:<[email protected]>
250 Accepted
DATA
354 Enter message, ending with "." on a line by itself
X-Mailer: Postman SMTP 2.0.22 for WordPress (https://ww.wp.xz.cn/plugins/post-smtp/)
X-WPCF7-Content-Type: text/plain
Content-Type: text/plain; charset=UTF-8
From: ReleaseHypnotherapy <[email protected]>
Sender: [email protected]
To: [email protected]
Reply-To: [email protected]
Message-Id: <[email protected]>
Subject: Release Hypnotherapy Enquiry
Date: Thu, 08 Apr 2021 07:12:31 +0000
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
MIME-Version: 1.0

From: Joe Miller =0A=0AEmail: <[email protected]>=0A=0APho=
ne Number: +1542384593234=0A=0AEnquiry:=0A=0ATERMINATION OF DOMAIN guild=
fordhypnotherapist.com=0D=0AInvoice#: 491343=0D=0ADate: 08 Apr 2021=0D=
=0A=0D=0AIMMEDIATE ATTENTION REGARDING YOUR DOMAIN guildfordhypnotherapi=
st.com IS ABSOLUTLY NECESSARY=0D=0A=0D=0ATERMINATION OF YOUR DOMAIN guil=
dfordhypnotherapist.com WILL BE COMPLETED WITHIN 24 HOURS=0D=0A=0D=0AYou=
r payment for the renewal of your domain guildfordhypnotherapist.com has=
 not received yet=0D=0A=0D=0AWe have tried to reach you by phone several=
 times, to inform you regarding the TERMINATION of your domain guildford=
hypnotherapist.com=0D=0A=0D=0ACLICK HERE FOR SECURE ONLINE PAYMENT: http=
s://hostdomains.ga=0D=0A=0D=0AIF WE DO NOT RECEIVE YOUR PAYMENT WITHIN 2=
4 HOURS, YOUR DOMAIN guildfordhypnotherapist.com WILL BE TERMINATED!=0D=
=0A=0D=0ACLICK HERE FOR SECURE ONLINE PAYMENT: https://hostdomains.ga=0D=
=0A=0D=0AYOUR IMMEDIATE ATTENTION IS ABSOLUTELY NECESSARY IN ORDER TO KE=
EP YOUR DOMAIN guildfordhypnotherapist.com=0D=0A=0D=0AThe submission not=
ification guildfordhypnotherapist.com will EXPIRE WITHIN 24 HOURS after=
 reception of this email.=0A=0A-- =0AThis e-mail was sent from a contact=
 form on Release Hypnotherapy (http://releasehypnotherapy.com)
.
550 This message was classified as SPAM and may not be delivered

Here is the diagnostic information.

Mailer: postsmtp
HostName: releasehypnotherapy.com
cURL Version: 7.71.0
OpenSSL Version: OpenSSL/1.1.1d
OS: Linux ams20.stablehost.com 2.6.32-954.3.5.lve1.4.74.el6.x86_64 #1 SMP Thu Oct 17 04:22:13 EDT 2019 x86_64
PHP: Linux 7.4.16 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=No, mcrypt=No, zlib_encode=Yes
WordPress: 5.7 en_US UTF-8
WordPress Theme: Twenty Fourteen
WordPress Plugins: All 404 Redirect  to Homepage, Contact Form 7, Cookie Notice & Compliance for GDPR / CCPA, Exclude Pages From Menu, Google Analytics for WordPress by MonsterInsights, LiteSpeed Cache, Loginizer, Post SMTP, Yoast SEO Premium, Yoast SEO
WordPress wp_mail Owner: /home4/hypnoonc/releasehypnotherapy.com/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, PostsmtpMailer->get_mail_args
WordPress phpmailer_init Action(s): wpcf7_phpmailer_init, PostsmtpMailer->phpmailer_smtp_init
Postman: 2.0.22
Postman Sender Domain (Envelope|Message): releasehypnotherapy.com | releasehypnotherapy.com
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: SMTP (smtps:plain://hypno-oncology.com:465)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 29 | 15

Many Thanks