Are you the one who accidentally shared the emails or someone who's email was shared?
Regardless of what we think, your board will do what they will.
Based on the info provided below, members have a right to those addresses anyway.
From
the Davis Stirling site on membership lists Email Addresses. Beginning January 1, 2020, members' email addresses, which are officially made available to an association, must be added to the membership list information. Civil Code § 5200 defines "Association records" to include membership lists with email addresses. With the steady increase in junk email, identity theft, malware, and hacking, most owners do not want their email addresses made public without their permission. Fortunately, the Davis-Stirling Act allows members to opt out of the membership list (see below).
Opting Out
Although Corporations Code § 8330(c) allows withholding the entire membership list if the association provides an alternate means of communication, the statute was modified by the legislature so that associations can no longer withhold the list. (Civ. Code § 5200(a)(9) and § 5205.) However, members retain the right to opt out of the list.
A member of the association may opt out of the sharing of his or her name, property address, and mailing address by notifying the association in writing that he or she prefers to be contacted via the alternative process described in subdivision (c) of Section 8330 of the Corporations Code. This opt-out shall remain in effect until changed by the member. (Civ. Code § 5220.)
Alternative Methods for Contact. Opting out does not mean owners are immune from contact with other members. The statute that allows opting out also provides that the association must provide an alternative means for contacting members. (Civ. Code § 5220.) Following are two options for handling communications with members who opt out of the membership list:
1) HOA Applies Labels. Members who want to mail a letter to opt-out members can deliver their letter to the association in sealed envelopes with postage already applied. The association (or its management company) then applies mailing labels to the envelopes and drops them in the mail.
2) Mailing House. A complete mailing list of all members (including opt-out members) could be provided by the association to an independent printer/mailer. A member who wants to mail a letter to all other members takes it to the company, which then applies mailing labels and mails it to everyone. Or, in the alternative, prints the letter, puts it in envelopes, applies mailing labels and postage, and drops it in the mail. It depends on the level of service offered by the company.