You would have to configure your PHP to use an SMTP server. Sendmail doesn't work locally.
You can also use SendGrid or Mailgun Elgg plugin for testing. Both service provide free email packages, which should be sufficient for testing.
Configuring PHP is not an option on sites that run multiple domains. We need a quick solution on Elgg to use an external SMTP server instead.
info@elgg.org
Security issues should be reported to security@elgg.org!
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