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DEV: Add bounce_error_code to EmailLog (#15948)

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Whenever we got a bounced email in the Email::Receiver we
previously would just set bounced: true on the EmailLog and
discard the status/diagnostic code. This commit changes this
flow to store the bounce error code (defined in the RFC at
https://www.iana.org/assignments/smtp-enhanced-status-codes/smtp-enhanced-status-codes.xhtml)
not just in the Email::Receiver, but also via webhook events
from other mail services and from SNS.

This commit does not surface the bounce error in the UI,
we can do that later if necessary.
This commit is contained in:
Martin Brennan
2022-02-15 14:17:26 +10:00
committed by GitHub
parent a0c65e91d9
commit 4086ee551e
8 changed files with 92 additions and 42 deletions
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8
lib/email/receiver.rb
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@ -238,16 +238,20 @@ module Email
def handle_bounce
@incoming_email.update_columns(is_bounce: true)
mail_error_statuses = Array.wrap(@mail.error_status)
if email_log.present?
email_log.update_columns(bounced: true)
email_log.update_columns(
bounced: true,
bounce_error_code: mail_error_statuses.first
)
post = email_log.post
topic = email_log.topic
end
DiscourseEvent.trigger(:email_bounce, @mail, @incoming_email, @email_log)
if @mail.error_status.present? && Array.wrap(@mail.error_status).any? { |s| s.start_with?("4.") }
if mail_error_statuses.any? { |s| s.start_with?(Email::SMTP_STATUS_TRANSIENT_FAILURE) }
Email::Receiver.update_bounce_score(@from_email, SiteSetting.soft_bounce_score)
else
Email::Receiver.update_bounce_score(@from_email, SiteSetting.hard_bounce_score)