Testing a module or Drupal fails because an email was not sent

Problem / Motivation

It is no longer possible to test a module or Drupal core because spinning a new site fails because it is not possible to send emails. The failure message is the following one.

sendmail: 450 Failed to capture message; if this persists, please contact Tugboat support
WD mail: Error sending e-mail (from admin@example.com to admin@example.com).
Installation complete.
Unable to send e-mail. Contact the site administrator if the problem persists.
Command Failed (Tugboat Error 1064): Exit code: 1; Command: drush -r "${DOCROOT}" si standard --account-name=admin --account-pass=admin -y

The installation completes, but the site is not accessible because Drush returns an error.

Comments & Activities

Issue created by @apaderno
Status changed to Fixed 2 months ago2:02pm 17 August 2025
Comment 2 months ago →
🇺🇸United States mglaman WI, USA
I wonder if this was a hiccup on Tugboat end. Because email capture is part of the platform. Seeing Tugboat Error 1064 makes me think that is the case. See https://docs.tugboatqa.com/building-a-preview/preview-deep-dive/inside-a...

It seems like things are OK now
Comment 2 months ago →
🇮🇹Italy apaderno Brescia, 🇮🇹
I apologize: I forgot about this issue. I can confirm I no longer get that error.
Comment about 2 months ago →
System Message
Automatically closed - issue fixed for 2 weeks with no activity.