Mailroom Information

The El Dorado Mailroom serves as an extension of the United States Postal Service and follows its policies. The mailroom is not able to provide all of the services of USPS and it is a federal offense to tamper with another person’s mail.

Mailing Address & Mailbox Information

All residents will be issued a mailbox number and combination information will be sent to their horizon email address 7-10 business days after official check-in. The mailbox assigned at move-in will not change during the entire stay in Pioneer Heights including any changes of assignments during the year or in subsequent years. Your mailing address needs to include the mailbox number and all mail should be addressed as follows:

First Name Last Name

1901 Harder Road, Box # <your mailbox number>

Hayward, CA 94542

Please note that, at the mailing address above, the “Box” number is your mailbox number and NOT your room or apartment number!

Receiving Mail

Due to the amount of mail we receive on a daily basis, we are unable to hold packages for an extended amount of time. If a package has not been picked up after 30 days or if the student does not live on campus and receives mail, it will be sent back to the sender-Forwarding mail/packages is not an option due to limited resources.

Letters: Will be placed in students’ assigned mailbox unless it is too large and it will be logged as a package.

CSUEB Official Documents: All CSUEB documents dropped off via inner campus delivery will be logged as packages.

Packages: Students should wait for an email from before going to the mailroom. If a student receives a “Confirmation of Delivery” from their carrier and still hasn’t received an email from the mailroom to pick up their package; please allow at least 48 business hours.

*Please pick up packages in a timely manner, failure to pick up your package within 2 weeks of the receipt date will result in the package being returned to the sender.

Perishable Items: Grocery deliveries are accepted at the mailroom only if a full name (First and Last) is provided. If the resident's full name is not on the package it will be rejected.

  • Instacart
  • Amazon Groceries
  • Flower Shops
  • Shipt

*The mailroom does not have the capacity to refrigerate any items and residents must immediately pick up their perishable packages upon receiving notification via email or phone call. Failure to pick up perishable items within 48 hours will result in the package being thrown away to prevent pests from being brought to the mailroom.

Food Deliveries: Food deliveries are not accepted and it is the student's responsibility to manage the drop-off. The mailroom will not take items from;

  • DoorDash
  • Uber Eats
  • Postmates
  • GrubHub
  • Restaurant deliveries
  • Etc.

Medicine: If a student is expecting to receive prescription medicine in the mailroom please provide the following ahead of delivery to

Student’s Name
Carrier (USPS, UPS, Amazon, etc.)
Expected Date of Delivery
Cell phone/email address

Outgoing Mail

Outgoing Mail/Packages: Only packages with a return label provided by the vendor or mail with the correct amount of prepaid postage will be accepted, please bring your already prepared mail/ package to the mailroom. Allow 48 business hours for the package to be sent out.

  • If the designated carrier does not stop by El Dorado Mailroom, staff will not drop off packages at the carrier's location and will wait for the next delivery/pickup instance.
  • Residents are able to purchase stamps through the Campus Bookstore, the mailroom “Does Not” carry stamps.

Forwarding Mail: El Dorado mailroom does not forward mail. If a student is preparing to move out of the Residence Halls it is their responsibility to submit a “Change of Address” form online or at the post office. If the mailroom receives mail from a student who does not live on campus, the mail will be returned to its original sender.

Delays in Receiving Mail

Misaddressed packages(wrong name/nickname) or letters might be returned to the sender or there will be a delay in the processing time. If the resident correctly addressed the package/letter and has not received a pickup notification or seen it in their mailbox after 48 business hours of carrier notification, please fill out the Mailbox and Packages Issues form.

Missing Packages: If “Confirmation of Delivery” from the carrier (USPS, UPS, Amazon, etc.) is received and the resident does not receive an email to pick up their package from the mailroom after 48 business hours of carrier notification please submit a Mailbox and Package Issues Form. Please allow 48 hours for the Mailroom staff to provide an update on their findings.

Mailbox issues: If a student is having issues with opening their mailbox please complete and submit a Mailbox and Package Issues Form allow 48 hours for the mailroom staff to send updates.

Wrong Mail/Package: If mail is placed in your mailbox or you have been given the wrong package by mistake, please return it to the mailroom as soon as possible as it is a federal offense to tamper with another person’s mail and fill out a Mailbox and Package Issues Form.

Please review the California Code of Regulations – Title 5, Section 41301: Standards of Student Conduct (

“Student behavior that is not consistent with the Student Conduct Code” including, but not limited to “disorderly, lewd, indecent, or obscene behavior at a University-related activity, or directed toward a member of the University Community” will be “addressed through an educational process that is designed to promote safety and good citizenship and, when necessary, and may impose appropriate consequences.”

Students who are found in violation of the Student Conduct Code will be documented and will face repercussions.

El Dorado Mailroom

Hours of Operation
Hours of Operation
Monday 10:30 AM - 7:30 PM
Tuesday 10:30 AM - 7:30 PM
Wednesday 10:30 AM - 7:30 PM
Thursday 10:30 AM - 7:30 PM
Friday 10:30 AM - 7:30 PM
Saturday 11:30 AM - 2:30 PM

*Hours will change due to Holidays, campus closures, and any other special circumstances.


Mailbox and Package Issues Form

Carriers Information

Phone: 1-866-216-1072 Retail Pick-Up Request

Phone: 1-877-252-4823 Customer Care

Phone: 1-800-225-5345

Phone: 1-800-463-3339 Customer Care

Phone: 1-800-334-5000

Phone: 1-800-742-5877

Hub: 8400 Pardee Ave

Oakland, CA 94621

Phone: 510-783-2404

Hub: 24438 Santa Clara St.

Hayward, CA 94545-8098