eMail bounce, Fatal Error 255

I just sent an email to my club members list for club #944247 and got the bounce message pasted below.
I saw posts in the forum from others who had similar errors and that they were resolved, but this just happened.

thanks,

jimMail Delivery Subsystem <MAILER-DAEMON@toastmastersclubs.org> 9:33 PM (4 minutes ago) 

to me
The original message was received at Wed, 24 Dec 2025 05:33:45 GMT
from  mail-yx1-f48.google.com  [74.125.224.48]

   

---

The following addresses had permanent fatal errors

---

|/etc/ tcmail.pl
    (reason: 255)
    (expanded from: <This email address is being protected from spambots. You need JavaScript enabled to view it.>)

   

---

Transcript of session follows

---

554 5.3.0 unknown mailer error 255

---

Forwarded message

---

From: Jim Robison <This email address is being protected from spambots. You need JavaScript enabled to view it.>
To: This email address is being protected from spambots. You need JavaScript enabled to view it.