From f3d93ac759ee2ac08ecc7308d3019796e2285797 Mon Sep 17 00:00:00 2001 From: Guilhem Moulin Date: Thu, 4 Jun 2015 19:02:31 +0200 Subject: Use recipient address verification probes. This is specially useful for mailing lists and the webmail, since it prevents our outgoing gateway from accepting mails known to be bouncing. However the downside is that it adds a delay of up to 6s after the RCPT TO command. --- roles/MSA/templates/etc/postfix/main.cf.j2 | 4 +++- roles/common/files/etc/logcheck/ignore.d.server/postfix-local | 9 ++++++--- roles/out/templates/etc/postfix/main.cf.j2 | 3 +++ roles/webmail/templates/etc/postfix/main.cf.j2 | 4 +++- 4 files changed, 15 insertions(+), 5 deletions(-) diff --git a/roles/MSA/templates/etc/postfix/main.cf.j2 b/roles/MSA/templates/etc/postfix/main.cf.j2 index 800dda8..331753a 100644 --- a/roles/MSA/templates/etc/postfix/main.cf.j2 +++ b/roles/MSA/templates/etc/postfix/main.cf.j2 @@ -99,7 +99,8 @@ smtpd_delay_reject = yes disable_vrfy_command = yes # UCE control -unknown_client_reject_code = 554 +unknown_client_reject_code = 554 +unverified_recipient_reject_code = 550 smtpd_client_restrictions = permit_sasl_authenticated @@ -121,6 +122,7 @@ smtpd_relay_restrictions = smtpd_recipient_restrictions = reject_non_fqdn_recipient reject_unknown_recipient_domain + reject_unverified_recipient smtpd_data_restrictions = reject_unauth_pipelining diff --git a/roles/common/files/etc/logcheck/ignore.d.server/postfix-local b/roles/common/files/etc/logcheck/ignore.d.server/postfix-local index 5e16aea..fd6cbcb 100644 --- a/roles/common/files/etc/logcheck/ignore.d.server/postfix-local +++ b/roles/common/files/etc/logcheck/ignore.d.server/postfix-local @@ -5,7 +5,8 @@ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/postfix-script\[[[:digit:]]+\]: refreshing the Postfix mail system$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/master[[[:digit:]]+]: reload -- version [.[:digit:]]+, configuration /etc/postfix$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/smtpd\[[[:digit:]]+\]: (dis)?connect from [^[:space:]]+$ -^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/[ls]mtp\[[[:digit:]]+\]: [[:xdigit:]]{10}: to=<[^[:space:]]+>,( orig_to=<[^[:space:]]+>,)? relay=[._[:alnum:]-]+\[[[:digit:].]{7,15}\](:[[:digit:]]{1,5})?, (conn_use=[[:digit:]]+, )?delay=[.[:digit:]]+(, delays=([.[:digit:]]+/){3}[.[:digit:]]+)?(, dsn=2(\.[[:digit:]]+){2})?, status=sent \(2[[:digit:]][[:digit:]] .+\)$ +^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/smtpd\[[[:digit:]]+\]: (NOQUEUE|[[:xdigit:]]{10}): reject: RCPT from [._[:alnum:]-]+\[[[:digit:].]{7,15}\]: [45][[:digit:]][[:digit:]] [45](\.[[:digit:]]+){2} <[^>]+>: Recipient address rejected: ((unverified|undeliverable) address:|Domain not found;) +^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/[ls]mtp\[[[:digit:]]+\]: [[:xdigit:]]{10}: to=<[^[:space:]]+>,( orig_to=<[^[:space:]]+>,)? relay=[._[:alnum:]-]+\[[[:digit:].]{7,15}\](:[[:digit:]]{1,5})?, (conn_use=[[:digit:]]+, )?delay=[.[:digit:]]+(, delays=([.[:digit:]]+/){3}[.[:digit:]]+)?(, dsn=2(\.[[:digit:]]+){2})?, status=(sent|deliverable) \(2[[:digit:]][[:digit:]] .+\)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/anvil\[[[:digit:]]+\]: statistics: max (message|recipient|connection) (count|rate) [/[:digit:]s]+ for \(([.:[:xdigit:]]+)?(smtp[sd]?|25|submission|587)?:([.:[:xdigit:]]+|unknown)\) at \w{3} [ :[:digit:]]{11}$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/anvil\[[[:digit:]]+\]: statistics: max cache size [[:digit:]]+ at \w{3} [ :[:digit:]]{11}$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/scache\[[[:digit:]]+\]: statistics: start interval \w{3} [ :[:digit:]]{11}$ @@ -18,6 +19,8 @@ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/n?qmgr\[[[:digit:]]+\]: [[:alnum:]]+: message-id=(<[^>]*>|[[:alnum:]_/+.@-]+)( \(added by [^[:space:]]+\))? ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/n?qmgr\[[[:digit:]]+\]: [[:alnum:]]+: removed$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/n?qmgr\[[[:digit:]]+\]: [[:alnum:]]+: skipped, still being delivered$ +^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/verify\[[[:digit:]]+\]: close database /var/lib/postfix\1/verify_cache\.db: No such file or directory \(possible Berkeley DB bug\)$ +^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix(-\w+)?/verify\[[[:digit:]]+\]: cache btree:/var/lib/postfix\1/verify_cache full cleanup: retained=[[:digit:]]+ dropped=[[:digit:]]+ entries$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-msa/smtpd\[[[:digit:]]+\]: lost connection after (AUTH|DATA \([[:digit:]]+ bytes\)) from [._[:alnum:]-]+\[[[:digit:].]{7,15}\]$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-\w+/smtpd\[[[:digit:]]+\]: lost connection after (CONNECT|STARTTLS) from [._[:alnum:]-]+\[([[:digit:].]{7,15}|unknown)\]$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-msa/cleanup\[[[:digit:]]+\]: [[:xdigit:]]{10}: replace: header\s @@ -33,12 +36,12 @@ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-(msa|webmail)/smtpd\[[[:digit:]]+\]: (NOQUEUE|[[:xdigit:]]+): reject: [[:upper:]]+ from [^[:space:]]+: 504( 5\.5\.2)? <[^>]*>: (Recipient|Sender) address rejected: need fully-qualified address;( from=<[^>]*> to=<[^[:space:]]+>)? proto=E?SMTP( helo=<[^[:space:]]+>)?$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-msa/smtpd\[[[:digit:]]+\]: NOQUEUE: reject: RCPT from [._[:alnum:]-]+\[[[:xdigit:].:]{3,39}\]: 554 5\.7\.1 <[._[:alnum:]-]+\[[[:xdigit:].:]{3,39}\]>: Client host rejected: Access denied;( from=<[^>]*> to=<[^[:space:]]+>)? proto=E?SMTP( helo=<[^[:space:]]+>)?$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-mda/lmtp\[[[:digit:]]+\]: [[:xdigit:]]{10}: to=<[^[:space:]]+>,( orig_to=<[^[:space:]]+>,)? relay=[._[:alnum:]-]+\[private/dovecot-lmtpd\],( conn_use=[[:digit:]]+,)? delay=[.[:digit:]]+(, delays=([.[:digit:]]+/){3}[.[:digit:]]+)?(, dsn=2(\.[[:digit:]]+){2})?, status=sent \(2[[:digit:]][[:digit:]] .+\)$ -^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/(error|n?qmgr|smtp)\[[[:digit:]]+\]: [[:alnum:]]+: to=<[^[:space:]]+>,( orig_to=<[^[:space:]]+>,)? relay=(none|[^[:space:]]+\[[[:digit:].]{7,15}\]:(25|587)),( conn_use=[[:digit:]]+,)? delay=[[:digit:].]+,( delays=[[:digit:]./]+,)?( dsn=[45]\.[[:digit:]]\.[[:digit:]],)? status=(deferred|undeliverable) \((delivery temporarily suspended: )?((lost connection with [^[:space:]]+|conversation with [^[:space:]]+ timed out) while (sending [[:alnum:]]+( [[:alnum:]]+)?|performing the (HELO|EHLO) handshake|receiving the initial server greeting|sending [[:alnum:]]+( [/[:alnum:]]+)?|sending end of data -- message may be sent more than once)|connect to [^[:space:]]+: (Connection timed out|read timeout|Connection refused)|host [^[:space:]]+ refused to talk to me: [45][[:digit:]][[:digit:]].*|Host or domain name not found. Name service errorfor name=[^[:space:]]+ type=MX: Host not found, try again|User unknown in virtual alias table)\)$ +^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-\w+/(error|n?qmgr|smtp)\[[[:digit:]]+\]: [[:alnum:]]+: to=<[^[:space:]]+>,( orig_to=<[^[:space:]]+>,)? relay=(none|[^[:space:]]+\[[[:digit:].]{7,15}\]:[[:digit:]]+),( conn_use=[[:digit:]]+,)? delay=[[:digit:].]+,( delays=[[:digit:]./]+,)?( dsn=[45]\.[[:digit:]]\.[[:digit:]],)? status=(deferred|undeliverable) \((delivery temporarily suspended: )?((lost connection with [^[:space:]]+|conversation with [^[:space:]]+ timed out) while (sending [[:alnum:]]+( [[:alnum:]]+)?|performing the (HELO|EHLO) handshake|receiving the initial server greeting|sending [[:alnum:]]+( [/[:alnum:]]+)?|sending end of data -- message may be sent more than once)|connect to [^[:space:]]+: (Connection timed out|read timeout|Connection refused)|host [^[:space:]]+ refused to talk to me: [45][[:digit:]][[:digit:]].*|Host or domain name not found. Name service errorfor name=[^[:space:]]+ type=MX: Host not found, try again|User unknown in virtual alias table|host [^[:space:]]+\[[[:digit:].]{7,15}\] said: [45][[:digit:]][[:digit:]] [45](\.[[:digit:]]+){2} <[^>]+>: (Temporarily rejected\. Try again later\.|Recipient address rejected: (undeliverable|unverified) address:) .*)\)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/smtp\[[[:digit:]]+\]: [[:alnum:]]+: lost connection with [._[:alnum:]-]+\[[[:digit:].]{7,15}\] while (receiving the initial server greeting|sending [[:upper:] ]+)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/smtp\[[[:digit:]]+\]: [[:alnum:]]+: conversation with [^[:space:]]+ timed out while sending message body$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/smtp\[[[:digit:]]+\]: [[:upper:][:digit:]]+: to=<[^[:space:]]+>(, orig_to=<[^[:space:]]+>)?, relay=[._[:alnum:]-]+\[[[:digit:].]{7,15}\](:[[:digit:]]{1,5})?,( conn_use=[[:digit:]]+,)? delay=[.[:digit:]]+(, delays=([.[:digit:]]+/){3}[.[:digit:]]+)?(, dsn=[45](\.[[:digit:]]+){2})?, status=(deferred|bounced|undeliverable|SOFTBOUNCE) \(host [._[:alnum:]-]+\[[[:digit:].]{7,15}\] said: [45][[:digit:]][[:digit:]][- ]+.* \(in reply to (HELO|EHLO|MAIL FROM|RCPT TO|DATA|end of DATA) command\)\)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/smtp\[[[:digit:]]+\]: connect to [^[:space:]]+: (read timeout|Connection (refused|timed out)|Network is unreachable|No route to host)( \(port [[:digit:]]+\))?$ -^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/[ls]mtp\[[[:digit:]]+\]: [[:upper:][:digit:]]+: to=<[^[:space:]]+>, relay=[._[:alnum:]-]+\[[[:digit:].]{7,15}\](:[[:digit:]]{1,5})?, (conn_use=[[:digit:]]+, )?delay=[.[:digit:]]+(, delays=([.[:digit:]]+/){3}[.[:digit:]]+)?(, dsn=[45](\.[[:digit:]]+){2})?, status=(deferred|bounced|undeliverable) \(host [._[:alnum:]-]+\[[[:digit:].]{7,15}\] said: [45][[:digit:]][[:digit:]] .+ \(in reply to (HELO|EHLO|MAIL FROM|RCPT TO|end of DATA) command\)\)$ +^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/[ls]mtp\[[[:digit:]]+\]: [[:upper:][:digit:]]+: to=<[^[:space:]]+>, relay=(none|[._[:alnum:]-]+\[[[:digit:].]{7,15}\](:[[:digit:]]{1,5})?), (conn_use=[[:digit:]]+, )?delay=[.[:digit:]]+(, delays=([.[:digit:]]+/){3}[.[:digit:]]+)?(, dsn=[45](\.[[:digit:]]+){2})?, status=(deferred|bounced|undeliverable) \((host [._[:alnum:]-]+\[[[:digit:].]{7,15}\] said: [45][[:digit:]][[:digit:]] .+ \(in reply to (HELO|EHLO|MAIL FROM|RCPT TO|end of DATA) command\)|connect to [^[:space:]]+: (read timeout|Connection (refused|timed out)|Network is unreachable|No route to host)( \(port [[:digit:]]+\))?)\)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/smtp\[[[:digit:]]+\]: [[:upper:][:digit:]]+: host [._[:alnum:]-]+\[[[:xdigit:].:]{3,39}\] said: [45][[:digit:]][[:digit:]][- ]+.* \(in reply to (HELO|EHLO|MAIL FROM|RCPT TO|(end of )?DATA) command\)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-(mda|out)/smtpd\[[[:digit:]]+\]: [[:xdigit:]]{10}: client=[._[:alnum:]-]+\[[[:xdigit:].:]{3,39}\], orig_queue_id=[[:xdigit:]]{10}, orig_client=[._[:alnum:]-]+\[[[:xdigit:].:]{3,39}\]$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix-out/smtp\[[[:digit:]]+\]: [A-Z[:digit:]]+: to=<[^[:space:]]+>,( orig_to=<[^[:space:]]+>,) relay=[^[:space:]]+, delay=[[:digit:]]+, status=deferred \(host [^[:space:]]+ said: [45][[:digit:]]{2} <[^[:space:]]*>: Recipient address rejected: Greylisted for [[:digit:]]+ (seconds|minutes)(\(see http://isg.ee.ethz.ch/tools/postgrey/help/[.[:alnum:]-]+.html\))? \(in reply to (HELO|EHLO|MAIL FROM|RCPT TO|DATA|end of DATA) command\)\)$ diff --git a/roles/out/templates/etc/postfix/main.cf.j2 b/roles/out/templates/etc/postfix/main.cf.j2 index eab3c0b..968e977 100644 --- a/roles/out/templates/etc/postfix/main.cf.j2 +++ b/roles/out/templates/etc/postfix/main.cf.j2 @@ -68,6 +68,8 @@ strict_rfc821_envelopes = yes smtpd_delay_reject = yes disable_vrfy_command = yes +unverified_recipient_reject_code = 550 + smtpd_client_restrictions = permit_mynetworks permit_tls_clientcerts @@ -90,6 +92,7 @@ smtpd_relay_restrictions = smtpd_recipient_restrictions = reject_non_fqdn_recipient reject_unknown_recipient_domain + reject_unverified_recipient smtpd_data_restrictions = reject_unauth_pipelining diff --git a/roles/webmail/templates/etc/postfix/main.cf.j2 b/roles/webmail/templates/etc/postfix/main.cf.j2 index 9d535c6..f4079d6 100644 --- a/roles/webmail/templates/etc/postfix/main.cf.j2 +++ b/roles/webmail/templates/etc/postfix/main.cf.j2 @@ -75,7 +75,8 @@ smtpd_delay_reject = yes disable_vrfy_command = yes # UCE control -unknown_client_reject_code = 554 +unknown_client_reject_code = 554 +unverified_recipient_reject_code = 550 smtpd_client_restrictions = permit_mynetworks @@ -98,6 +99,7 @@ smtpd_relay_restrictions = smtpd_recipient_restrictions = reject_non_fqdn_recipient reject_unknown_recipient_domain + reject_unverified_recipient smtpd_data_restrictions = reject_unauth_pipelining -- cgit v1.2.3