Should I use a seperate but related domain to send reports from my new webapp?


In other webapps I've done I've always sent email from the same domain as the app. However for my next project I'm thinking of using a related domain. For example if my webapp domain was the report emails would originate from

The app sends daily reports and I'm wary of getting blacklisted as a spammer. The emails are opt-in but in the past I've encountered users flagging automatic email they request as spam instead of disabling emails.

If I send from a related domain I should be able move to a new IP if necessary without disrupting the service's primary email. I really can't think of a downside other than user's expectations that mails would originate from the app domain.


Email Deliverability

asked Jan 4 '10 at 05:42
Doug Martin
123 points
  • If you go with another domain, you always have the option to forge the "From: [email protected]" header to make it look like the email comes from your main domain. – Olivier Lalonde 14 years ago

3 Answers


It's nice to use a separate domain, but not because of black-listing, but rather to give you flexibility in how and where the email service is done.

There are SMTP services you can use that will prevent you from being blacklisted; you may want to investigate e.g. or MailChimps.

answered Jan 4 '10 at 12:26
16,231 points


I like to use separate domains for outbound emails -- it's much more flexible.

The one downside to this is that there is some minimal "brand dilution" (because the domain doesn't exactly match), but I think the tradeoff is worth it.

answered Jan 4 '10 at 15:31
Dharmesh Shah
2,865 points


No. Generally, ISPs blacklist IPs -- not domains. So there is a benefit to using a different IP address from the one you use for outgoing corp email. But the deliverability benefit for using a different domain is smaller than the downside (brand confusion as dharmesh said, maintaining 2 domains, etc).

answered Jan 5 '10 at 02:29
831 points

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