Hello,

I have a problem with postfix. It is installed on a host in my small home lan behind a router. My ISP is rogers. I have 3 external email addresses I am testing to/from, one of them being me@rogers.com, the others me@somewhere.ca and me@somewhereelse.ca. My local domain is mydomain.ca so I am trying to send from me@mydomain.

I can receive mail for me@mydomain.ca from each of these accounts no problem but I can only send mail successfully from this account to me@rogers.com.

mymailhost:/etc/postfix# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
mydestination = $myhostname localhost.$mydomain localhost $mydomain
mydomain = mydomain.ca
myhostname = mymailhost.mydomain.ca
mynetworks = 192.168.0.0/24, 127.0.0.0/8
myorigin = $mydomain
notify_classes = bounce,delay,policy,protocol,resource,software
relay_domains =
smtp_tls_CAfile = /etc/postfix/cacert.pem
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP
smtpd_client_restrictions = permit_sasl_authenticated permit_mynetworks
smtpd_recipient_restrictions = permit_sasl_authenticated permit_mynetworks reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_tls_CAfile = /etc/postfix/cacert.pem
smtpd_tls_cert_file = /etc/postfix/toots-cert.pem
smtpd_tls_key_file = /etc/postfix/toots-key.pem
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
tls_random_source = dev:/dev/urandom

mail.log:
Oct 14 23:31:16 mymailhost postfix/smtp[9166]: 5F01426400: to=<me@somewhere.ca>, relay=none, delay=60, delays=0.04/0.02/60/0, dsn=4.4.1, status=deferred (connect to filter.somewhere.ca[ipaddress]:25: Connection timed out)

Oct 14 23:31:51 mymailhost postfix/smtp[9188]: 7EFCE26403: to=<me@somewhereelse.ca>, relay=none, delay=60, delays=0.03/0.01/60/0, dsn=4.4.1, status=deferred (connect to mail.somewhereelse.ca[ipaddress]:25: Connection timed out)

Oct 14 23:31:36 mymailhost postfix/smtp[9178]: 164E126402: to=<me@rogers.com>, relay=mx2.rog.mail.yahoo.com[206.190.37.7]:25, delay=60, delays=0.03/0.01/60/0.14, dsn=2.0.0, status=sent (250 ok dirdel)

I attempted to use relayhost=[smtp.broadband.rogers.com] in main.cf

with sasl_passwd:
[smtp.broadband.rogers.com] me:myrogerspassword

then postmap sasl_passwd and reload and send new test messages but then mail no longer is delivered to me@rogers.com (or the others).

Hi

I don't know about your ISP, but most (including mine) will block any traffic where destination port is 25, except if it is to their SMTP server. The reason is that it's mostly used for spam and viruses, so it's probably wise.

My ISP does not require authentication to use the SMTP server, but they have a rule on which IP addresses that can use it, if you don't use authentication. (So basically you can only use it when using their network.)

But there should be no [] in the main.cf file. Try this:

relayhost = smtp.broadband.rogers.com

If it doesn't work, look at /var/log/mail.log. It should give you a clue why.

I attempted your suggestion:

mymailhost:/etc/postfix# vi main.cf
mymailhost:/etc/postfix# vi sasl_passwd
mymailhost:/etc/postfix# postconf -n | grep relayhost
relayhost = smtp.broadband.rogers.com
mymailhost:/etc/postfix# cat sasl_passwd
smtp.broadband.rogers.com me:myrogerspassword
mymailhost:/etc/postfix# postmap sasl_passwd
mymailhost:/etc/postfix# /etc/init.d/postfix reload
Reloading Postfix configuration...done.

mail.log:
Oct 15 22:52:33 mymailhost postfix/master[23048]: reload configuration /etc/postfix
Oct 15 22:57:33 mymailhost postfix/qmgr[17147]: 241DB263F9: from=<me@mydomain.ca>, size=599, nrcpt=1 (queue active)
Oct 15 22:57:33 mymailhost postfix/smtp[17176]: warning: valid_hostname: empty hostname
Oct 15 22:57:33 mymailhost postfix/smtp[17176]: warning: malformed domain name in resource data of MX record for smtp.broadband.rogers.com:
Oct 15 22:57:33 mymailhost postfix/smtp[17176]: warning: valid_hostname: empty hostname
Oct 15 22:57:33 mymailhost postfix/smtp[17176]: warning: malformed domain name in resource data of MX record for smtp-rog.mail.yahoo.com:
Oct 15 22:57:33 mymailhost postfix/smtp[17176]: warning: relayhost configuration problem
Oct 15 22:57:33 mymailhost postfix/smtp[17176]: 241DB263F9: to=<me@somewhere.ca>, relay=none, delay=87508, delays=87508/0.04/0.07/0, dsn=4.3.5, status=deferred (Name service error for name=smtp-rog.mail.yahoo.com type=MX: Malformed or unexpected name server reply)
Oct 15 23:16:44 mymailhost postfix/smtp[17292]: 410B626404: to=<me@somewhereelse.ca>, relay=none, delay=0.11, delays=0.04/0.02/0.05/0, dsn=4.3.5, status=deferred (Name service error for name=smtp-rog.mail.yahoo.com type=MX: Malformed or unexpected name server reply)

Here is the configuration that I was able to get to work:

mymailhost:/etc/postfix# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
mydestination = $myhostname localhost.$mydomain localhost $mydomain
mydomain = mydomain.ca
myhostname = mymailhost.mydomain.ca
mynetworks = 192.168.0.0/24, 127.0.0.0/8
myorigin = $mydomain
notify_classes = bounce,delay,policy,protocol,resource,software
relay_domains =
relayhost = [smtp.broadband.rogers.com]
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_CAfile = /etc/postfix/cacert.pem
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP
smtpd_client_restrictions = permit_sasl_authenticated permit_mynetworks
smtpd_recipient_restrictions = permit_sasl_authenticated permit_mynetworks reject_unauth_destination
smtpd_tls_CAfile = /etc/postfix/cacert.pem
smtpd_tls_cert_file = /etc/postfix/toots-cert.pem
smtpd_tls_key_file = /etc/postfix/toots-key.pem
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
tls_random_source = dev:/dev/urandom

mymailhost:/etc/postfix# cat sasl_passwd
[smtp.broadband.rogers.com] me:myrogerspassword