On Thursday, November 12, 2026, there was a Global Microsoft 365 outage. Rest assured, our core operating system, ATMs, mobile app, and telephone banking do not rely on Microsoft, and this outage did not impact our operations. We understand that most of the software impacted by the outage has been restored today, Friday, November 13, 2026. However, if your email is sluggish and you would like to reach us, please call us directly at 617-269-2700.
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Email
Please fill out the form below to email us. We will respond as soon as possible. If you need faster service, please call us at 617-269-2700. Please DO NOT include personal information such as account numbers, social security number, or any other confidential information via this e-mail.
Phone
Our Main Number is: (617) 269-2700
For Lost or Stolen Debit Cards: (800) 472-3272
Call Center Hours:
Monday 8:30 AM — 4:00 PM
Tuesday 8:30 AM — 4:00 PM
Wednesday 8:30 AM — 4:00 PM
Thursday 8:30 AM — 4:00 PM
Thursday 8:30 AM — 4:00 PM
Friday 8:30 AM — 4:00 PM
Saturday 8:30 AM — 1:15 PM
24-hour Telephone banking system: (617) 269-2700, Press 9.Saturday 8:30 AM — 1:15 PM
Please use our contact form to the left or email memberservices@massbaycu.org
Fax
South Boston: (617) 269-2725
Quincy Branch: (617) 481-1358
Everett Branch: (617)-294-2196
Quincy Branch: (617) 481-1358
Everett Branch: (617)-294-2196
Seaport Branch: (857) 277-0664