The on-premises Rollbar instance sends emails via standard SMTP. The server to use can be configured when running the program. This defaults to using the bundled postfix server solution.

We set up your on-premises Rollbar instance to send emails with a from address patterned like The username part of the address is always rollbar. The portion comes from the FQDN you specify when running This gives you a predictable from address that you can add to your spam filters, firewall whitelists, etc...


Making email work can be a beast. If you're having trouble with the bundled postfix server, your best bet is to look in the postfix logs. This will most likely point you in the right direction.

./ -s postfix

Amazon EC2

The bundled postfix service has problems sending email on EC2 instances. The problem we've seen is that trying to send email to gmail addresses gets rejected because EC2 IP addresses have terrible reputation. We assume this will be a problem as well with other high quality email providers, so for EC2 we recommend NOT using the built in postfix service. There are several ways around this. If you, the customer, already have a working SMTP email solution in place (ie. Mailgun, your own SMTP server, etc...), then you should use that. If not, then we've had success using Amazon's SES email service. That's our recommended solution when you don't have another one.

When configuring your installation (running, be sure to specify the --smtp_host, --smtp_user, and --smtp_password options. This will set up your on-premises Rollbar instance to use your external SMTP provider.

Amazon SES

If you decide to use SES, then you'll need to go through a few steps to get it all working right. I recommend reading the SES documentation to understand what all is going on there.

If you're in a hurry, though, this seems to be the bare minimum required to setup the service.

  1. enable SES on your account and go to the SES control panel
  2. validate your domain using the TXT record method via the "Domains" tab
  3. validate the individual email addresses you will be sending to via the "Email Addresses" tab
  4. generate SMTP user credentials
  5. plug in the SMTP credentials when running