Failed delivery status for many emails

  • Resolved raivos

    (@raivos)


    8 months, 4 weeks ago

    As of yesterday, around 4 PM GMT +1, i noticed a high increase in SMTP delivery error emails in my inbox. It appears many of my emails are getting a delivery error, while 30% or so get delivered. I don’t recon any updates that were done or plugins modified/added.

    If i attempt to resend the failed emails, they either fail again, or get delivered right away (even if they fail again).

    All of these errors read under email logs as:
    Code: , Message: , Body:

    The rest of it is empty. Sometimes when i send a test email to myself, it also fails.

    I’m using Post SMTP with Sendgrid. The Post SMTP plugin was at first the free version, but now i’ve upgraded it to paid version. I’ve also updated all my plugins on the website and the theme, but it did not help. The website is hosted by Kinsta, but they told me that the email sending is not affected in any way by them.

    I also contacted Sendgrid and they did something called a Telnet Test, which was successful. The emails that receive the failed status, never show up on sendgrid at all, and they told me everything is working on their end.

    …I also paid for Post SMTP technical support, however after their contacted me about being available today, they never got back to me…

    Since this is a critical issue for my company, does someone have any ideas what to do next?

    Diagnostics log:

    Mailer: postsmtp
HostName: motohorn.com
cURL Version: 7.68.0
OpenSSL Version: OpenSSL/1.1.1i
OS: Linux kkr-motohorncom-live-prod 5.4.0-1122-gcp #131-Ubuntu SMP Mon Jan 15 14:52:45 UTC 2024 x86_64
PHP: Linux 8.0.28 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
WordPress: 6.4.3 en_US UTF-8
WordPress Theme: Flatsome Child
WordPress Plugins: Advanced Email Delivery and Logs, Advanced Shipment Tracking Pro, Attachment Support for Post SMTP (Premium), BlueSnap Payment Gateway for WooCommerce, Classic Editor, PayPal Express Checkout Payment Gateway for WooCommerce, FunnelKit Funnel Builder Pro, FunnelKit Funnel Builder, Jetpack, Kadence WooCommerce Email Designer, Metorik Helper, PixelYourSite, Post SMTP Extension For Amazon SES, Post SMTP, Report and Tracking for Post SMTP, TrackShip for WooCommerce, Post SMTP Twilio Notifications (Premium), Advanced Order Export For WooCommerce, WooCommerce PayPal Payments, WooCommerce Photo Reviews Premium, WooCommerce Sequential Order Numbers Pro, WooCommerce, AeroCheckout: Custom WooCommerce Checkout Pages, Yoast SEO, FunnelKit Automations Connectors, FunnelKit Automations Pro, FunnelKit Automations, WP Rocket, WPForms Lite
WordPress wp_mail Owner: /www/motohorncom_978/public/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, PS_Add_Attachment->wp_mail, PostsmtpMailer->get_mail_args, Post_SMTP_Track->wp_mail
WordPress phpmailer_init Action(s): WC_Email_New_Order->handle_multipart, WC_Email_Cancelled_Order->handle_multipart, WC_Email_Failed_Order->handle_multipart, WC_Email_Customer_On_Hold_Order->handle_multipart, WC_Email_Customer_Processing_Order->handle_multipart, WC_Email_Customer_Completed_Order->handle_multipart, WC_Email_Customer_Refunded_Order->handle_multipart, WC_Email_Customer_Invoice->handle_multipart, WC_Email_Customer_Note->handle_multipart, WC_Email_Customer_Reset_Password->handle_multipart, WC_Email_Customer_New_Account->handle_multipart, WC_Email_Customer_Shipped_Order->handle_multipart, WC_Email_Customer_Partial_Shipped_Order->handle_multipart, WC_Email_Customer_Updated_Tracking_Order->handle_multipart, WC_Bluesnap_Email_Chargeback_Order->handle_multipart, WFOCU_WC_Email_Updated_Order->handle_multipart, WFOCU_WC_Email_Updated_Order_Admin->handle_multipart
Postman: 2.8.11
Postman Sender Domain (Envelope|Message):  | motohorn.com
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: SendGrid API (https://api.sendgrid.com:443)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 7094839 | 2402
    • This topic was modified 8 months, 4 weeks ago by raivos.
    • This topic was modified 8 months, 4 weeks ago by raivos.
    • This topic was modified 8 months, 4 weeks ago by raivos.
Viewing 6 replies - 1 through 6 (of 6 total)
  • Plugin Author Saad Iqbal

    (@saadiqbal)

    Hi @raivos,

    Sorry to hear regarding your recent case. As per SendGrid status report they were facing some issues in their mailing servers.

    REF: https://status.sendgrid.com/incidents/frf5plm1nrds

    As per the report hopefully they have resolved those issues now.

    Still do let us know if there is any thing we can help you with.

    Thanks!

    Plugin Author Saad Iqbal

    (@saadiqbal)

    @raivos
    ?? Also we have a good news for you. POST SMTP has recently launched its?Mobile App?to get instant email failure notifications and view all sent email history from your smartphone. You can give it a try, and do let us know your feedback.

    Thanks!

    Thread Starter raivos

    (@raivos)

    Unfortunately this is not fixed, my email delivery is extremely bad and the same issue continues. The plugin fails to deliver 70% of emails to Sendgrid.

    Also, why did you change this to resolved status without first confirming with the post creator if the issue was resolved?

    • This reply was modified 8 months, 4 weeks ago by raivos.
    • This reply was modified 8 months, 4 weeks ago by raivos.
    Plugin Author Saad Iqbal

    (@saadiqbal)

    @raivos, no worries. Just turned the status to not resolved for you.
    For your information the SendGrid team is still facing server delays on some of their servers
    REF: https://status.sendgrid.com/incidents/zhgbtj2s7yt4
    So still there is probability that some of your emails may fail. For the time being I suggest to switch to some other mailing service (preferably Brevo) which you can setup in few mins with POST SMTP.

    Our support team is already connected with you to assist and resolve your case. But we can not help much if the service itself is down.

    Thanks!

    Thread Starter raivos

    (@raivos)

    I’ve fixed this issue by deleting the plugin and using a different one. Immediately the next 70 emails got a successful delivery and all show up under the Sendgrid too.

    Disabling all other plugins on my website did not solve this, so there is something wrong with the Post SMTP plugin itself.

    If possible please delete this post or the content of my first post – i can no longer edit it for some reason.

    Plugin Support M Haseeb

    (@haseeb0001)

    @raivos Hi

    Thank you for your response. We have attempted to reproduce this case on multiple staging websites, but we haven’t encountered the same issue. It appears that the problem might be specific to your website, possibly related to the theme or some form of conflict.

    Thanks and regards,
    Support Team – WPExperts  

Viewing 6 replies - 1 through 6 (of 6 total)
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