Connectivity and Diagnostic errors

  • Hosted on DreamHost. Some emails not being delivered. Getting this Postman Diagnostic report:

    OS: Linux bywater 3.2.61-grsec-modsign #1 SMP Tue Aug 12 09:58:26 UTC 2014 x86_64
    PHP: Linux 5.5.38 C
    PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=Yes, zlib_encode=Yes
    WordPress: 4.6.1 en_US UTF-8
    WordPress Theme: Illustrious Pro
    WordPress Plugins: JSO Updates, Advanced Ads Pro, Advanced Ads, Advanced Custom Fields, Advanced Post Manager, Admin Columns, Content Aware Sidebars, CPO Content Types, Event Calendar Newsletter Pro Group By Modifications, Enhanced Media Library, Event Calendar Newsletter Pro, The Events Calendar PRO, Facebook Like Box, Optin Forms, Participants Database, Postman SMTP, PTA Volunteer Sign Up Sheets, Save with keyboard, Shortcodes Ultimate, Simple Membership After Login Redirection, Simple Membership Custom Messages, Simple Membership MailChimp Integration, Simple WordPress Membership, Social Sharing Toolkit, SWPM Member Data Exporter, The Events Calendar: Community Events, The Events Calendar: List Venues/Organizers Shortcodes, The Events Calendar Shortcode, The Events Calendar, TJ Custom CSS, TinyMCE Advanced, UpdraftPlus – Backup/Restore, Wired Impact Volunteer Management, WP All Export
    WordPress wp_mail Filter(s): wp_staticize_emoji_for_email
    Postman: 1.7.2
    Postman Sender Domain (Envelope|Message): jazzoregon.com | jazzoregon.com
    Postman Prevent Message Sender Override (Email|Name): No | No
    Postman Active Transport: SMTP (smtp:tls:plain://sub4.mail.dreamhost.com:587)
    Postman Active Transport Status (Ready|Connected): Yes | Yes
    Postman Deliveries (Success|Fail): 1 | 3

    DreamHost recommends: sub4.mail.dreamhost.com, port 465, SMTP security but Postman wizard is selecting port 587 with STARTTLS.

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