Email by Postman

What is Postman?

Postman is a mass messaging tool for the Singapore Government. To date, Postman has sent out more than 100 million messages from over 90 agencies. These include quarantine orders, COVID-19 test results, and employer notices.

More information about Postman can be found here

Send email

Field	Description	Required?
Email subject	Sets the subject line that recipients will see in their inbox.	✔️
Body	Sets the main content of the email, which the recipient will see in the message area. You can enter plain text, use variables from previous steps to personalise the message, or format it with the editor to add tables, images, and links.	✔️
Recipient email(s)	Sets the email address(es) of the recipient(s). Note: each recipient will receive an individual email.	✔️
CC recipient email(s)	Sets the recipients to be CC’d on every email. Note: CC recipients will receive a separate copy of the email for each main recipient. For example, if there are 5 main recipients, each CC recipient will receive 5 emails. If you want to avoid duplicate emails, add those recipients to the Recipient email(s) field instead.
Sender name	Sets the from name for the email. For example, setting "Your custom name", this name will appear in the from field of the email sent to recipients.	✔️
Reply-To email	Sets the Reply-To address for the email. When recipients click Reply, their response will be directed to this address instead of the From address. For example, setting "[e-mail]" means replies will be sent to that address.	If left blank, it defaults to your email address.
Attachments	Add attachments to your emails from multiple sources, including FormSG, LetterSG, and manual uploads. For a list of supported file types, refer to the Postman documentation here. To upload your own files: 1. Click on the Uploaded attachments tab 2. Upload your own files 3. Select them from the list

BCC is not supported. Each recipient in the Recipient email(s) field already receives an individual email and cannot see other recipients, which achieves a similar outcome.

1. Set up your email by completing the required fields:

   1. Email subject

   2. Body

   3. Recipient email(s)

   4. Sender name

2. Set up the optional fields, if required.

3. Click on Check step to save and send an email to the address(es) specified in Recipient email(s)

Check step

The Check step button saves your set up and tests the Email by Postman action by sending a real email to the address(es) specified in the Recipient email(s) field. This allows you to verify the email output before the Pipe is published and the workflow runs automatically.

Common errors

Blacklisted recipient

This happens when email addresses are added to the Postman blacklist after a delivery attempt results in a hard bounce (e.g., the email address does not exist).

Click the link to submit a request to remove the email from the blacklist. Once you receive a notification from Plumber confirming the removal, try sending the email to the recipient again.

Total attachment size exceeded

This happens when the cumulative size of all attachments exceed the limit imposed by Postman.

You should check that the attachments do not exceed 10 MB in total.

Invalid attachment

This can happen for the following reasons:

• Password-protected files - Plumber is unable to process password-protected attachments. Remove the password protection before attaching the file.

• Unsupported file type - check that your attachment is not an executable or script file type (e.g. .exe, .bat, .js). For the full list, refer to the AWS SES documentation.

Invalid recipient emails

There is an invalid email in the field (e.g., invalid-email.com).

CC recipient did not receive email

The email status of CC recipients is not tracked by Postman, which means no blacklist notification will be sent.

In such cases, you will need to manually resend the email to the blacklisted CC recipient.

More details can be found here.