Metlo relies on email messaging for certain functionality. For example:
  • Sending a password reset link to a user
  • Sending alerts over email
While not required, not enabling email messaging will limit these actions, and thus Metlo recommends enabling it.

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Configuration

Add the following env vars to /opt/metlo/.env:
  • SMTP_SERVER: Address where the email server resides
  • SMTP_USER: User used to authorize emails. Can be different from EMAIL_SENDER
  • SMTP_PASSWORD: Password for user used in SMTP_USER
  • EMAIL_SENDER: Default user email sender
  • SELF_LINK: Link to an accessible address for the metlo frontend
Metlo requires TLS enabled email service providers.

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Example Configuration

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Sendgrid

Sendgrid
SMTP_SERVER=smtp.sendgrid.net
SMTP_USER=apikey
SMTP_PASSWORD=SG.ABCD-EFGHIHJKLMNOPQRSTU.VWXYZ1234567890ab_cdefghijklmnopqrstuvwxyz_
EMAIL_SENDER=test-user@example.com
SELF_LINK=http://localhost:3000

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Mailgun

Mailgun
SMTP_SERVER=smtp.eu.mailgun.org
SMTP_USER=test-user@example.com
SMTP_PASSWORD=password
EMAIL_SENDER=test-user-2@example.com
SITE_URL=http://localhost:3000

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Gmail

Gmail
SMTP_SERVER=smtp.gmail.com
SMTP_USER=test-user@example.com # Email just needs to be managed by google. So domain can be different from gmail
SMTP_PASSWORD=password
EMAIL_SENDER=test-user-2@example.com
SITE_URL=http://localhost:3000