Open Relay

Rate this page:

An SMTP server configured in such a way that it allows anyone on the Internet to send email through it.

An SMTP server configured in such a way that it allows anyone on the Internet to send email through it, not just mail destined for or originating from known users. This is not a recommended configuration because it can be exploited by spammers. Servers with open relays are routinely blocked.

To get more information please check out our Email Infrastructure Guide.

Rate this page:

Thank you for your feedback!

Please select the reason(s) for your feedback. The additional information you provide helps us improve our documentation:

Sending your feedback...
🎉 Thank you for your feedback!
Something went wrong. Please try again.

Thanks for your feedback!

Refer us and get $10 in 3 simple steps!

Step 1

Get link

Get a free personal referral link here

Step 2

Give $10

Your user signs up and upgrade using link

Step 3

Get $10

1,250 free SMSes
OR 1,000 free voice mins
OR 12,000 chats
OR more