Email Relay for Apps (SMTP)

Table of Contents

Overview

ITS has established smtp.hawaii.edu for the UH Application Developer community to use in application development. Given that a large number of printers and other appliances now point to mail.hawaii.edu, the intention is to establish a separate SMTP server for developers in order to help insulate applications from any issue that might crop up with mail.hawaii.edu.

smtp.hawaii.edu

• Recommended for application developers to utilize in UH applications that generate email messages

• Port 25 is only available from within the UH network (see "Troubleshooting ..." below).

• The infrastructure for this service features a load-balancer and two physically isolated virtual hosts.

mail.hawaii.edu

• Legacy SMTP server

• Will continue to be used by the various departments for setting up printers, scanners, etc.

Email Sending Limits

For more information on sending limits, please consult these resources:

• <https://www.hawaii.edu/askus/1203>

• <https://support.google.com/a/answer/166852?hl=en>

Service Limitations

• This service does not relay mail for @hawaii.edu users from non-UH networks.  In other words, it is not available for use by outside service providers.

Troubleshooting smtp.hawaii.edu

• Cannot connect.

  • ITS is allowing all UH networks to connect to smtp.hawaii.edu:25. Check your server and firewall to ensure that outbound connections on port 25 are permitted.

  • If you are configuring a username and password for your mailer software, don't.

  • You are on the UH VPN provided to the UH community. It no longer works. Due to spammers highjacking UH accounts in order to spam through this relay, access had to be discountinued.