Question

Email client does not read incoming mail outgoing fine.

  • Posted December 17, 2014

Hello, I set up Debian with ISPConfig 3. However i am running into a problem reading incoming mail in Squirrel or Outlook. Sending mail works fine. I can see the mail sitting in /var/mail/{mailid} where {mailid} is the file. I sent a message from my gmail account and confirmed it is there so it appears my DNS/MX is fine.

Sending from either Squirrel and Outlook works fine. It appears the issue is between the mail server and client.

Does anyone suggest what I should look at? Thanks!

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Looking at your domain, the MX for caltaer.com goes to mail.caltaer.com, which points to 104.236.106.57

I take it 104.236.106.57 is the IP of the server in question. When I telnet to it, it appears to be working:

 telnet 104.236.106.57 25
Trying 104.236.106.57...
Connected to 104.236.106.57.
Escape character is '^]'.
220 caltaer.com ESMTP Postfix (Debian/GNU)

IMAP on 143 respons with STARTTLS (secure), so that’s good:

telnet 104.236.106.57 143
Trying 104.236.106.57...
Connected to 104.236.106.57.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready.

Next, checking port 993:

jharris@jonsjava:~$ telnet 104.236.106.57 993
Trying 104.236.106.57...
Connected to 104.236.106.57.
Escape character is '^]'.

All looks right there too.

This only leaves the /etc/postfix/main.cf , /etc/postfix/master.cf , & /etc/dovecot/dovecot.conf files as likely culprits.

Can we see a copy of those files?

Hi rustx, The domain is caltaer.com I am not familiar with the nmap command. Is it Win or Linux? Tried on both, not found. I was connecting using POP. I switched to IMAP trying both 143 and 993 and Outlook will not connect. Thanks for the suggestions.

Hi Nelson,

Could we know what is the domain on the which one you want to access IMAP service ?

The good tests to do from your laptop are :

nmap -PN mail.yourdomain.com (or whatever domain you have in MX)

This will show you all opened ports at that IP. To have IMAP and IMAPs working fine, you should have port 143 and/or 993 port opened to be sure outlook can connect your IMAP service.

The next step would be to configure outlook properly, to use the good authentication method while sending mailbox credentials.

I am not an ISPConfig expert, but I think those tests could help you to understand what happens.

Hope this help !

– rustx


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Thanks for peeking at this. The three config files follow:

/etc/dovecot/dovecot.conf

listen = *,[::] protocols = imap pop3 auth_mechanisms = plain login disable_plaintext_auth = no log_timestamp = "%Y-%m-%d %H:%M:%S " mail_privileged_group = vmail ssl_cert = </etc/postfix/smtpd.cert ssl_key = </etc/postfix/smtpd.key ssl_protocols = !SSLv2 !SSLv3 passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } plugin { quota = dict:user::file:/var/vmail/%d/%n/.quotausage sieve=/var/vmail/%d/%n/.sieve } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } user = root } service imap-login { client_limit = 1000 process_limit = 500 } protocol imap { mail_plugins = quota imap_quota } protocol pop3 { pop3_uidl_format = %08Xu%08Xv mail_plugins = quota } protocol lda { mail_plugins = sieve quota }

**/etc/postfix/master.cf **

Postfix master process configuration file. For details on the format

of the file, see the master(5) manual page (command: “man 5 master”).

Do not forget to execute “postfix reload” after editing this file.

==========================================================================

service type private unpriv chroot wakeup maxproc command + args

(yes) (yes) (yes) (never) (100)

==========================================================================

smtp inet n - - - - smtpd #smtp inet n - - - 1 postscreen #smtpd pass - - - - - smtpd #dnsblog unix - - - - 0 dnsblog #tlsproxy unix - - - - 0 tlsproxy submission inet n - - - - smtpd -o syslog_name=postfix/submission -o smtpd_tls_security_level=encrypt -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject

-o milter_macro_daemon_name=ORIGINATING

smtps inet n - - - - smtpd -o syslog_name=postfix/smtps -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject

-o milter_macro_daemon_name=ORIGINATING

#628 inet n - - - - qmqpd pickup fifo n - - 60 1 pickup cleanup unix n - - - 0 cleanup qmgr fifo n - n 300 1 qmgr #qmgr fifo n - n 300 1 oqmgr tlsmgr unix - - - 1000? 1 tlsmgr rewrite unix - - - - - trivial-rewrite bounce unix - - - - 0 bounce defer unix - - - - 0 bounce trace unix - - - - 0 bounce verify unix - - - - 1 verify flush unix n - - 1000? 0 flush proxymap unix - - n - - proxymap proxywrite unix - - n - 1 proxymap smtp unix - - - - - smtp relay unix - - - - - smtp

-o smtp_helo_timeout=5 -o smtp_connect_timeout=5

showq unix n - - - - showq error unix - - - - - error retry unix - - - - - error discard unix - - - - - discard local unix - n n - - local virtual unix - n n - - virtual lmtp unix - - - - - lmtp anvil unix - - - - 1 anvil scache unix - - - - 1 scache

====================================================================

Interfaces to non-Postfix software. Be sure to examine the manual

pages of the non-Postfix software to find out what options it wants.

Many of the following services use the Postfix pipe(8) delivery

agent. See the pipe(8) man page for information about ${recipient}

and other message envelope options.

====================================================================

maildrop. See the Postfix MAILDROP_README file for details.

Also specify in main.cf: maildrop_destination_recipient_limit=1

maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/bin/maildrop -d vmail ${extension} ${recipient} ${user} ${nexthop} ${sender}

====================================================================

Recent Cyrus versions can use the existing “lmtp” master.cf entry.

Specify in cyrus.conf:

lmtp cmd=“lmtpd -a” listen=“localhost:lmtp” proto=tcp4

Specify in main.cf one or more of the following:

mailbox_transport = lmtp:inet:localhost

virtual_transport = lmtp:inet:localhost

====================================================================

Cyrus 2.1.5 (Amos Gouaux)

Also specify in main.cf: cyrus_destination_recipient_limit=1

#cyrus unix - n n - - pipe

user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}

====================================================================

Old example of delivery via Cyrus.

#old-cyrus unix - n n - - pipe

flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}

====================================================================

See the Postfix UUCP_README file for configuration details.

uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)

Other external delivery methods.

ifmail unix - n n - - pipe flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient) bsmtp unix - n n - - pipe flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient scalemail-backend unix - n n - 2 pipe flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension} mailman unix - n n - - pipe flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user}

dovecot unix - n n - - pipe flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${user}@${nexthop} amavis unix - - - - 2 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes

127.0.0.1:10025 inet n - - - - smtpd -o content_filter= -o local_recipient_maps= -o relay_recipient_maps= -o smtpd_restriction_classes= -o smtpd_client_restrictions= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o mynetworks=127.0.0.0/8 -o strict_rfc821_envelopes=yes -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks

** /etc/postfix/main.cf **

See /usr/share/postfix/main.cf.dist for a commented, more complete version

Debian specific: Specifying a file name will cause the first

line of that file to be used as the name. The Debian default

is /etc/mailname.

#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no

appending .domain is the MUA’s job.

append_dot_mydomain = no

Uncomment the next line to generate “delayed mail” warnings

#delay_warning_time = 4h

readme_directory = /usr/share/doc/postfix

TLS parameters

smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_use_tls = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for

information on enabling SSL in the smtp client.

myhostname = caltaer.com alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases alias_database = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases myorigin = /etc/mailname mydestination = caltaer.com, localhost, localhost.localdomain relayhost = mynetworks = 127.0.0.0/8 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all html_directory = /usr/share/doc/postfix/html virtual_alias_domains = virtual_alias_maps = hash:/var/lib/mailman/data/virtual-mailman, proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf virtual_mailbox_base = /var/vmail virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 inet_protocols = all smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = yes smtpd_sasl_authenticated_header = yes smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf smtpd_tls_security_level = may transport_maps = hash:/var/lib/mailman/data/transport-mailman, proxy:mysql:/etc/postfix/mysql-virtual_transports.cf relay_domains = mysql:/etc/postfix/mysql-virtual_relaydomains.cf relay_recipient_maps = mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf smtpd_client_restrictions = check_client_access mysql:/etc/postfix/mysql-virtual_client.cf smtpd_client_message_rate_limit = 100 maildrop_destination_concurrency_limit = 1 maildrop_destination_recipient_limit = 1 virtual_transport = dovecot header_checks = regexp:/etc/postfix/header_checks mime_header_checks = regexp:/etc/postfix/mime_header_checks nested_header_checks = regexp:/etc/postfix/nested_header_checks body_checks = regexp:/etc/postfix/body_checks owner_request_special = no smtp_tls_security_level = may smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3 smtpd_tls_protocols = !SSLv2,!SSLv3 smtp_tls_protocols = !SSLv2,!SSLv3 dovecot_destination_recipient_limit = 1 smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth content_filter = amavis:[127.0.0.1]:10024 receive_override_options = no_address_mappings