When running email rules since Email Extension 2.90, getting the error that javax function not found. 

However, as you can see below, my updated template does not contain javax, only jakarta

import jakarta.mail.*
def envVars = run.getEnvironment(listener)
def blocklist = envVars.get("EMAIL_BLOCKLIST")
def debug = envVars.get("debug")
recipients = msg.getRecipients(jakarta.mail.Message.RecipientType.TO)
if (debug == "high")

{     logger.println envVars.get("BUILD_ID") + " is the build id returned to email" }

if (debug == "true") {
 recipients.each

{ addr ->   logger.println(addr)  }

}
filtered = recipients.findAll { addr -> (!(addr.toString().toUpperCase()?.contains('xxx')) && !(addr.toString().toUpperCase()?.contains('yyy')) && !(blocklist?.contains(addr.getAddress().split('@')[0]))) }
msg.setRecipients(jakarta.mail.Message.RecipientType.TO, filtered as jakarta.mail.Address[])
if(run.result.toString().equals("FAILURE"))

{  msg.addHeader("X-Priority","1 (Highest)");  msg.addHeader("Importance", "High"); }

cancel=run.result.toString().equals("ABORTED");