E-mail & Calendar News Archive

This page is an archive of any changes made to the infrastructure that have benefit to or might impact the university community.

New Email Message Size Limit; 2013-08-28

What is being changed?

The maximum message size limit of Western's Email service is being lowered from 50 megabytes to 25 megabytes.

Why is it changing?

This will align Western’s message size limits with other major Email Service Providers (ESPs). Using the same size limits as Google, Yahoo, and Hotmail, will help reduce delivery failures when sending messages which are too large for these external domains to accept.

Additionally, the new size will minimize the impact on email services when large attachments are inadvertently emailed to a wide list of recipients. This will help maintain email service quality and avoid disruptions to email delivery.

The lower message size limit will also reduce quota consumption and help prevent both the recipients and senders from going over their email quotas.

Who will be affected?

This change has the potential to affect anyone using Western’s email system, however most users should remain unaffected. We estimate that less than 0.04% of messages sent through Western’s email system will be impacted.

When will it change?

he new message size limit will take effect on Thursday, August 29th, 2013.

Changes to Email Authentication on Wireless Network; 2012-06-11

ITS is taking steps to improve the security of Western's email system. Email clients on Western's wireless network will soon be required to authenticate when sending email.The technical reason for this change is to allow us to more easily apply policy to email traffic from the "uwosecure" wireless network. This change to require authentication when sending mail will allow us to throttle or temporarily suspend outbound emails on a per-user basis.

We have identified email messages sent from individuals email address over a Western wireless session in the past month. We will be contacting these users in multiple stages. In order to maintain you email client's ability to send email, a minor configuration change is required. In general, your client's outbound SMTP server settings must be configured to: use SSL or TLS; and enable username+password authentication. If you neglect to make this change, your ability to receive and read email will not be affected, however you will be unable to send mail until your client is reconfigured.

Our current target date for this change is July 9th. If you wish to reconfigure your wireless device's email clients on your own, please follow the instructions for your client at: http://www.uwo.ca/its/doc/hdi/email/secure.html. Otherwise, please wait for ITS On-site to contact you for assistance. Any clients on the wireless network which fail to make the appropriate configuration changes by this date will still be able to receive and read their email, but will receive the following error message when trying to send mail until their client configuration is updated:

530 5.7.0 No AUTH command has been given.

If you have any questions or concerns, please contact the ITS Helpdesk: http://www.uwo.ca/its/helpdesk/

Change to Email Sending Rate Limits; 2012-06-07

ITS is taking steps to improve the security of Western's email system. We will be implementing a limit on the rate at which messages can be sent to external email addresses. This change will mitigate the impact of compromised hosts or accounts on our email system. For a full technical explanation of this change, including rationale and workarounds, please see: http://www.uwo.ca/its/email/ratelimits.html

There may also be an impact to a small number of hosts which send large volumes of legitimate email messages. We are sending targeted communications to the owners of hosts which we believe fit this category, based on previous email activity. This change will come into effect on June 25th.

If you have any questions or concerns about how this may affect you or users in your departments, please let us know.

Message Archive cont'd

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