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SMTP messages are failing intermittently

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I inherited a Drupal 7 site running Open Atrium and the sending of email messages is failing intermittently. 1 out of every 10 emails fails the with unable-to-authenticate error message. How are most emails working then? I've updated the email config to Signature Version 4.

Site is running on Pantheon and hasn't been updated in over a year. Using TLS and SMTP port is 587.

Drupal 7.78
PHP 7.3
SMTP module - 7.x-1.7

Edited by: jtjones23 on May 24, 2021 12:28 PM

Edited by: jtjones23 on May 24, 2021 12:31 PM

Topics
Front-End Web & MobileBusiness Applications
Tags
Amazon Simple Email Service
Language
English

asked 5 years ago377 views

1 Answer
0

Started working after I changed the From: email to a verified AWS email address.

Edited by: jtjones23 on May 24, 2021 1:10 PM

answered 5 years ago

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