| Email quota per account |
- 100 GB for staff (Exchange Online)
- 10 GB for project account (on-premises Exchange 2019)
- 50 GB for students and alumni (@Connect)
NB: Quota includes inbox and all other mail folders. Check your mailbox usage regularly
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| If quota reached |
- Staff (Exchange Online):
For Staff users, you can email to cchelp@ust.hk to turn on Online Archive Mailbox after reached 90GB.
- Warning issued at 98 GB
- Cannot send at 99 GB
- Cannot send/receive at 100GB
- Project account (on-premises Exchange 2019):
- Warning issued when usage exceeds 95% of quota
- Cannot send/receive mail when mailbox is 100% full, with senders receiving a bounce back message
- Student and Alumni (@Connect):
- Warning issued at 49 GB
- Cannot send at 49.5 GB
- Cannot send/receive at 50GB
NB: Keep monitoring your usage to avoid late delivery of incoming email, and archive older or less frequently used mail.
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| Maximum size of outgoing message |
- 10 MB for mailing lists
- 35 MB for students
- 50 MB (server: smtp.ust.hk)
- 100 MB among staff users
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| Maximum number of recipients per outgoing message |
- 500 email addresses (Office 365 users) 1
- ~250 – 260 (Outlook Client)
- 300 email addresses (server: smtp.ust.hk)
NB: To email larger numbers of recipients, use the mailing list service.
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