sequester_orphans.R tried to send an email to a blank email address

[pbchase]

sequester_orphans.R tried to send an email to a blank email address. This happened on the second sequestration job I ran on 2022-11-02.

> billing_alert_log %>% filter(error_message != "")
                recipient projects                                                                                                                          error_message
1           carek@ufl.edu     1573          Error in wait_for(code): SMTP Error: 5.1.1 <carek@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n
2   allisonjones4@ufl.edu     1595  Error in wait_for(code): SMTP Error: 5.1.1 <allisonjones4@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n
3  crystalralmond@ufl.edu     4766 Error in wait_for(code): SMTP Error: 5.1.1 <crystalralmond@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n
4         inelson@ufl.edu     7644        Error in wait_for(code): SMTP Error: 5.1.1 <inelson@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n
5    nkowalkowski@ufl.edu     7676   Error in wait_for(code): SMTP Error: 5.1.1 <nkowalkowski@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n
6    m.kazemzadeh@ufl.edu     7721   Error in wait_for(code): SMTP Error: 5.1.1 <m.kazemzadeh@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n
7  alainagiacobbe@ufl.edu     7733 Error in wait_for(code): SMTP Error: 5.1.1 <alainagiacobbe@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n
8         tgarren@ufl.edu     9462        Error in wait_for(code): SMTP Error: 5.1.1 <tgarren@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n
9                             9519                                                                 Error in wait_for(code): SMTP Error: 5.5.4 Syntax: RCPT TO:<address>\n
10         lganti@ufl.edu 148, 566         Error in wait_for(code): SMTP Error: 5.1.1 <lganti@ufl.edu>: Recipient address rejected: User unknown in virtual alias table\n

WTF? How did we do that on project 9519? I thought we filtered those odd-ball records out.

How should we respond to this? Not sequester? Not email anyone about the sequestration?