Authentication failed

  • Resolved marcustheo

    (@marcustheo)


    3 years, 9 months ago

    I’ve set up to use an Office365 account to send the emails on my website. The account details are correct, the account is set to have Authenticated SMTP enabled, but sending is failing. I get the following error message:

    220-blackwell.dnshostnetwork.com ESMTP Exim 4.94.2 #2 Tue, 15 Jun 2021 17:20:45 +0100 
220-We do not authorize the use of this system to transport unsolicited, 
220 and/or bulk e-mail.

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

Viewing 3 replies - 1 through 3 (of 3 total)

  • Hi @marcustheo,

    You are not connecting to Office 365, as blackwell.dnshostnetwork.com is a cPanel server – not Office 365 SMTP.

    Please paste a copy of your Post SMTP diagnostics log in your next reply, but it is likely your configuration is incorrect.

    Kind Regards,
    Tim

    Thread Starter marcustheo

    (@marcustheo)

    Thanks for replying Tim. I’ve completed all the fields, so I’m not sure I’ve done wrong in configuration. Anyway, here’s the diagnostics

    Mailer: postsmtp
HostName: napierwatt.co.uk
cURL Version: 7.74.0
OpenSSL Version: OpenSSL/1.1.1k
OS: Linux blackwell.dnshostnetwork.com 3.10.0-962.3.2.lve1.5.32.el7.x86_64 #1 SMP Fri Feb 28 07:18:51 EST 2020 x86_64
PHP: Linux 7.2.34 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=No, mcrypt=No, zlib_encode=Yes
WordPress: 5.5.5 en_US UTF-8
WordPress Theme: Flatsome Child
WordPress Plugins: Alfred, the Assistant, Contact Form 7, Cookie Notice & Compliance for GDPR / CCPA, Duplicate Page, Insert Headers and Footers, Nextend Social Login, Password Protected, Post SMTP, Property Hive Stamp Duty Calculator, Really Simple SSL, Slider Revolution Exploding Layers Add-On, Slider Revolution Typewriter Effect, Slider Revolution, Spotlight - Social Media Feeds, WooSidebars, Yoast SEO, WP Property Feed, WPForms
WordPress wp_mail Owner: /home/napierwattco/public_html/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: 2.0.23
Postman Sender Domain (Envelope|Message): napierwatt.co.uk | napierwatt.co.uk
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: SMTP (smtp:none:plain://smtp.office365.com:587)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 12 | 19

    Hi @marcustheo,

    Your security configuration is not correct.

    Change ‘Security’ from ‘None’ to ‘STARTTLS’.
    Change ‘Authentication’ from ‘Plain’ to ‘Login’.

    Then you can re-test and you should be okay. ??

    Kind Regards,
    Tim

Viewing 3 replies - 1 through 3 (of 3 total)
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