Niemi Hannu wrote:
Hello
I have been fighting with a problem with Postfix. There are some users that
insist on sending mail to large groups of recipients (yes I know that mailman
or similar is made for that) and there is a limit of number of recipients,
which I have after extensive testing managed to pinpoint to 500 recipients.
Less or equal amount goes, 501 not. And the size of the header or mail body
doesn't seem to be of any significance.
Now...where on Earth (or at least Postfix) this limit of 500 comes from?
Here is the result of postconf -n:
alias_maps = hash:/etc/aliases,hash:/var/lib/mailman/data/aliases
biff = no
canonical_maps = hash:/etc/postfix/canonical command_directory = /usr/sbin
config_directory = /etc/postfix daemon_directory = /usr/lib/postfix
debug_peer_level = 2 defer_transports = disable_dns_lookups = no
disable_mime_output_conversion = no html_directory =
/usr/share/doc/packages/postfix/html
inet_interfaces = all
inet_protocols = all
mail_owner = postfix
mail_spool_directory = /var/mail
mailbox_command =
mailbox_size_limit = 0
mailbox_transport =
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains = masquerade_exceptions = root message_size_limit = 10240000
mydestination = $myhostname, localhost.$mydomain myhostname =
listserv.kuntaliitto.fi mynetworks = 10.0.0.0/16, 127.0.0.0/8, 192.168.1.0/24
newaliases_path = /usr/bin/newaliases queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/packages/postfix/README_FILES
relay_domains = $mydestination, kuntaliitto.fi, kommunforbundet.fi, phnet.fi
relay_recipient_maps = relayhost = relocated_maps = hash:/etc/postfix/relocated
sample_directory = /usr/share/doc/packages/postfix/samples
sender_canonical_maps = hash:/etc/postfix/sender_canonical
sendmail_path = /usr/sbin/sendmail
setgid_group = maildrop
smtp_sasl_auth_enable = no
smtp_use_tls = no
smtpd_client_restrictions =
smtpd_helo_required = no
smtpd_helo_restrictions =
smtpd_recipient_limit = 1002
1002 max recipients.
Ronaldo
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
smtpd_sasl_auth_enable = no
smtpd_sender_restrictions = hash:/etc/postfix/access smtpd_use_tls = no
strict_8bitmime = no strict_rfc821_envelopes = no transport_maps =
hash:/etc/postfix/transport unknown_local_recipient_reject_code = 550
virtual_alias_domains = hash:/etc/postfix/virtual virtual_alias_maps =
hash:/etc/postfix/virtual
If you need some further information I am happy to provide it - whatever to get
away from those nagging users ;)
TIA
hannu
