lstprdls01:/var/log # postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
compatibility_level = 3.6
inet_interfaces = all
inet_protocols = all
local_recipient_maps = hash:/opt/mailman/mm/var/data/postfix_lmtp
mailbox_size_limit = 0
mydestination = $myhostname, localhost.$mydomain, listservnew.luc.edu 
lists.luc.edu
myhostname = lstprdls01.svr.luc.edu
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
owner_request_special = no
readme_directory = no
recipient_delimiter = +
relay_domains = hash:/opt/mailman/mm/var/data/postfix_domains
relayhost =
smtp_tls_ciphers = high smtpd_tls_ciphers = high
smtp_tls_exclude_ciphers = EXP, MEDIUM, LOW, DES, 3DES, SSLv2 
smtpd_tls_exclude_ciphers = EXP, MEDIUM, LOW, DES, 3DES, SSLv2
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated 
defer_unauth_destination
smtpd_tls_mandatory_protocols = !TLSv1.1 TLSv1.2 TLSv1.3
tls_high_cipherlist = 
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
transport_maps = hash:/opt/mailman/mm/var/data/postfix_lmtp
unknown_local_recipient_reject_code = 550

So, you helped me with this before and I think I got the mail to go through 
now, but now I am getting a different error, which I think may have to do with 
the aliases. The old server is using lists.luc.edu and the new server is using 
listservnew.luc.edu, but we still want people to use lists.luc.edu, but it be 
forwarded to the new server. I am getting this now.
2025-07-22T12:16:14.551521-05:00 lstprdls01 postfix/smtpd[190496]: NOQUEUE: 
reject: RCPT from unknown[10.18.3.105]: 550 5.1.1 <joet...@lists.luc.edu>: 
Recipient address rejected: User unknown in local recipient table; 
from=<jko...@luc.edu> to=<joet...@lists.luc.edu> proto=ESMTP 
helo=<DM1PR04CU001.outbound.protection.outlook.com>
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