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hostname service port function smtp 25 Local delivery (plain SMTP) submission 587 Email relay (SMTP with STARTTLS, password authentication required) smtps 465 Email relay (SMTP with SSL, password authentication required)

Hosted on


Administrative contact

  • postmaster AT sugarlabs DOT org



  • Users with a Sugar Labs shell account on sunjammer can use our SMTP relay for personal email submission. Any abuse will be prosecuted.
  • We prefer to use the submission port for email relay. Unauthenticated and unencrypted connections are not allowed to relay.
  • is *not* the MX for the

Google Apps handles our domain and forwards to for unknown users

  • Just for those of you wanting to use just one email client (namely gmail in this case), you can simply add a second account to run through gmail (say or and it will then allow you to choose which account you'd like to send from.

To do this you need to login to your gmail account and then go the following url (it is not easy to spot): Choose send mail from another address; follow the instructions for sending out via


Our domains use a non-strict (~all) SPF record.

If you send email with in the From: header, then you must submit it to our SMTP server.


Our domain publishes a test DKIM key. All outgoing email is signed, but at this time verifiers will ignore our DKIM signature.

To test DKIM, send an email to

In anticipation of switching on strict DKIM verification, all email for the domain must be submitted to our SMTP server. Failure to do so may result in your email being occasionally blocked by spam filters.

See also