PHP Mail Not Working

Discussion in 'Installation/Configuration' started by 3DPeruna, Mar 15, 2012.

  1. 3DPeruna

    3DPeruna New Member

    I've got (2) ISPConfig 3 servers. Server A hosts most domains and all emails. Server B hosts 1 domain, but no email. Server A has a direct IP address, Server B is behind a NAT.

    I would like to set it up so Server B can send mail (via SMTP) through Server A.

    Right now, I'm getting the following on Server B when I try to send mail through Server A: SMTP Error: Could not connect to SMTP host. Neither servers logs show anything (including running tail -f /var/log/syslog on both servers and watching what happens when I hit "send").

    Thoughts
     
  2. pititis

    pititis Member

    Can you send email from A to B?

    Some isp block port 25 to prevent spam from infected computers or spamers.

    Try to check your firewall/iptables configuration and try to connect manually to anothers mail servers(from B) with:

    Code:
    telnet mailservername 25
     
  3. 3DPeruna

    3DPeruna New Member

    Thanks... it does appear port 25 is blocked. However, our ISP itself doesn't block any of our ports (I've had this conversation with them in the past).

    Also, both servers are connected to the same router, with nothing in the hardware firewall. If the firewall isn't on the router, where else might I look?

    FYI: using http://network-tools.com/ I get a connection (that's rejected because relaying isn't allowed)
     
    Last edited: Mar 15, 2012
  4. falko

    falko Super Moderator

    What are the outputs of
    Code:
    netstat -tap
    and
    Code:
    iptables -L
    on server A? Are there any errors in your mail logs (on both servers)?
     
  5. 3DPeruna

    3DPeruna New Member

    Still pulling my hair out!

    Server A:

    netstat -tap

    Code:
    Active Internet connections (servers and established)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
    tcp        0      0 localhost.localdo:10024 *:*                     LISTEN      1113/amavisd (maste
    tcp        0      0 localhost.localdo:10025 *:*                     LISTEN      10998/master
    tcp        0      0 *:mysql                 *:*                     LISTEN      1061/mysqld
    tcp        0      0 *:submission            *:*                     LISTEN      10998/master
    tcp        0      0 *:http-alt              *:*                     LISTEN      11464/apache2
    tcp        0      0 *:www                   *:*                     LISTEN      11464/apache2
    tcp        0      0 XX-XXX-XXX-XXX.b:domain *:*                     LISTEN      2740/named
    tcp        0      0 thisismydomain:domain *:*                     LISTEN      2740/named
    tcp        0      0 localhost.locald:domain *:*                     LISTEN      2740/named
    tcp        0      0 *:ftp                   *:*                     LISTEN      1934/pure-ftpd (SER
    tcp        0      0 *:ssh                   *:*                     LISTEN      937/sshd
    tcp        0      0 *:smtp                  *:*                     LISTEN      10998/master
    tcp        0      0 localhost.localdoma:953 *:*                     LISTEN      2740/named
    tcp        0      0 *:https                 *:*                     LISTEN      11464/apache2
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50214 ESTABLISHED 1061/mysqld
    tcp        0    248 thisismydomain.c:ssh 69-168-254-123.br:55688 ESTABLISHED 17411/sshd: ohdweb
    tcp        0      0 localhost.localdo:50216 localhost.localdo:mysql ESTABLISHED 11489/smtpd
    tcp        0      0 localhost.localdo:50213 localhost.localdo:mysql ESTABLISHED 13573/trivial-rewri
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50216 ESTABLISHED 1061/mysqld
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50213 ESTABLISHED 1061/mysqld
    tcp        0      0 localhost.localdo:50204 localhost.localdo:mysql ESTABLISHED 13630/amavisd (ch1-
    tcp        0      0 localhost.localdo:50215 localhost.localdo:mysql ESTABLISHED 11489/smtpd
    tcp        0      0 localhost.localdo:50218 localhost.localdo:mysql ESTABLISHED 13574/proxymap
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50217 ESTABLISHED 1061/mysqld
    tcp        0      0 thisismydomain.:smtp static.227.227.47:47934 TIME_WAIT   -
    tcp        0      0 localhost.localdo:50221 localhost.localdo:mysql ESTABLISHED 13574/proxymap
    tcp        0      0 localhost.localdo:10025 localhost.localdo:59219 TIME_WAIT   -
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50212 ESTABLISHED 1061/mysqld
    tcp        0      0 localhost.localdo:59204 localhost.localdo:10025 ESTABLISHED 13630/amavisd (ch1-
    tcp        0      0 localhost.localdo:49970 localhost.localdo:mysql TIME_WAIT   -
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50218 ESTABLISHED 1061/mysqld
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50221 ESTABLISHED 1061/mysqld
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50215 ESTABLISHED 1061/mysqld
    tcp        0      0 localhost.localdo:10025 localhost.localdo:59204 ESTABLISHED 13654/smtpd
    tcp        0      0 thisismydomain.:smtp 42.113.172.235:50138    TIME_WAIT   -
    tcp        0      0 localhost.localdo:50214 localhost.localdo:mysql ESTABLISHED 13574/proxymap
    tcp        0      0 localhost.localdo:50212 localhost.localdo:mysql ESTABLISHED 13574/proxymap
    tcp        0      0 localhost.localdo:mysql localhost.localdo:50204 ESTABLISHED 1061/mysqld
    tcp        0      0 localhost.localdo:50217 localhost.localdo:mysql ESTABLISHED 13574/proxymap
    tcp6       0      0 [::]:imaps              [::]:*                  LISTEN      1752/couriertcpd
    tcp6       0      0 [::]:pop3s              [::]:*                  LISTEN      1818/couriertcpd
    tcp6       0      0 [::]:pop3               [::]:*                  LISTEN      1782/couriertcpd
    tcp6       0      0 [::]:imap2              [::]:*                  LISTEN      1711/couriertcpd
    tcp6       0      0 [::]:domain             [::]:*                  LISTEN      2740/named
    tcp6       0      0 [::]:ftp                [::]:*                  LISTEN      1934/pure-ftpd (SER
    tcp6       0      0 [::]:ssh                [::]:*                  LISTEN      937/sshd
    tcp6       0      0 ip6-localhost:953       [::]:*                  LISTEN      2740/named
    tcp6       0      0 thisismydomain.:pop3 69-168-254-123.br:58708 TIME_WAIT   -
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49616 ESTABLISHED 8828/couriertls
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49610 ESTABLISHED 8824/couriertls
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49611 ESTABLISHED 8808/imapd
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49615 ESTABLISHED 8829/couriertls
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49617 ESTABLISHED 8813/imapd
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:53905 ESTABLISHED 4950/couriertls
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49597 ESTABLISHED 8815/couriertls
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:65311 ESTABLISHED 5303/imapd
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49595 ESTABLISHED 8817/couriertls
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49603 ESTABLISHED 8825/couriertls
    tcp6       0      0 thisismydomain:imap2 69-168-254-123.br:49612 ESTABLISHED 8819/couriertls
    tcp6       0      0 thisismydomain.:pop3 69-168-254-123.br:58723 TIME_WAIT   -
    
    iptables -L

    Code:
    Chain INPUT (policy ACCEPT)
    target     prot opt source               destination
    fail2ban-ssh  tcp  --  anywhere             anywhere            multiport dports ssh
    fail2ban-courierimaps  tcp  --  anywhere             anywhere            multiport dports imaps
    fail2ban-courierpop3  tcp  --  anywhere             anywhere            multiport dports pop3
    fail2ban-courierimap  tcp  --  anywhere             anywhere            multiport dports imap2
    fail2ban-pure-ftpd  tcp  --  anywhere             anywhere            multiport dports ftp,ftp-data,ftps,ftps-data
    
    Chain FORWARD (policy ACCEPT)
    target     prot opt source               destination
    
    Chain OUTPUT (policy ACCEPT)
    target     prot opt source               destination
    
    Chain fail2ban-courierimap (1 references)
    target     prot opt source               destination
    RETURN     all  --  anywhere             anywhere
    
    Chain fail2ban-courierimaps (1 references)
    target     prot opt source               destination
    RETURN     all  --  anywhere             anywhere
    
    Chain fail2ban-courierpop3 (1 references)
    target     prot opt source               destination
    RETURN     all  --  anywhere             anywhere
    
    Chain fail2ban-courierpop3s (0 references)
    target     prot opt source               destination
    RETURN     all  --  anywhere             anywhere
    
    Chain fail2ban-pure-ftpd (1 references)
    target     prot opt source               destination
    RETURN     all  --  anywhere             anywhere
    
    Chain fail2ban-sasl (0 references)
    target     prot opt source               destination
    RETURN     all  --  anywhere             anywhere
    
    Chain fail2ban-ssh (1 references)
    target     prot opt source               destination
    RETURN     all  --  anywhere             anywhere
    
    /etc/postfix/main.cf
    Code:
    # 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 (Ubuntu)
    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 = thisismydomain.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 = thisismydomain.com, localhost, localhost.localdomain, $mydomains
    relayhost =
    mynetworks = 127.0.0.0/8 [::1]/128, XXX.XXX.XXX.XXX
    mailbox_size_limit = 0
    recipient_delimiter = +
    inet_interfaces = all
    html_directory = /usr/share/doc/postfix/html
    virtual_alias_domains =
    virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf, hash:/var/lib/mailman/data/virtual-mailman
    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
    smtpd_sasl_auth_enable = yes
    broken_sasl_auth_clients = yes
    smtpd_sasl_authenticated_header = yes
    smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
    smtpd_tls_security_level = may
    transport_maps = 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 $relay_$
    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 = maildrop
    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
    content_filter = amavis:[127.0.0.1]:10024
    receive_override_options = no_address_mappings
    smtpd_sasl_local_domain =
    smtpd_sasl_security_options = noanonymous
    smtpd_tls_auth_only = no
    smtp_use_tls = yes
    smtp_tls_note_starttls_offer = yes
    smtpd_tls_CAfile = /usr/local/ispconfig/interface/ssl/startssl.chain.class1.server.crt
    smtpd_tls_loglevel = 1
    smtpd_tls_received_header = yes
    smtpd_tls_session_cache_timeout = 3600s
    tls_random_source = dev:/dev/urandom
    message_size_limit = 0
    
    Just looking to get Server B to send through Server A...

    Server B is behind a NAT on a Cisco router. All ports open, nothing blocked at the router level.
     
  6. sjau

    sjau Local Meanie

    if you can't get it to work directly, an alternate approach would be to setup a open between those two servers. Then you can route the email though the vpn tunnel hence it uses a different port.

    Or you can use alternate ports for smtp... I usually do also free 2500 and 2525 or you could try the submission port (587)
     
  7. kwickcut

    kwickcut Member

    i assume that you are running this from your house, or work. i would check the outside ports to make sure they are open. i have heard that line before yes port 25 is open but the person that you are talking to knows nothing other then what is on the monitor in front of them.

    to check your ports you can use this site

    http://www.yougetsignal.com/tools/open-ports/

    if port 25 is blocked you can use a relay service to send mail out on port 2525


    this is how i have to do it sucks having to pay for a service but what are you going to do.
     
  8. 3DPeruna

    3DPeruna New Member

    Thanks. Going to http://www.yougetsignal.com/tools/open-ports/ shows port 25 open at Server A.

    When I send an email from Server B, though, I'm getting this:

    Code:
    Mar 16 17:00:21 myserver postfix/smtpd[26622]: connect from unknown[192.168.1.220]
    Mar 16 17:00:21 myserver postfix/smtpd[26622]: DA35B1C014C6: client=unknown[192.168.1.220], sasl_method=PLAIN, sasl_username=web@mail.myserver.com
    Mar 16 17:00:21 myserver postfix/cleanup[26624]: DA35B1C014C6: message-id=<4F63B7F4.2050900@mail.myserver.com>
    Mar 16 17:00:21 myserver postfix/qmgr[13490]: DA35B1C014C6: from=<web@mail.myserver.com>, size=1227, nrcpt=1 (queue active)
    Mar 16 17:00:22 myserver postfix/smtpd[26622]: disconnect from unknown[192.168.1.220]
    Mar 16 17:00:28 myserver postfix/smtpd[26684]: connect from localhost.localdomain[127.0.0.1]
    Mar 16 17:00:28 myserver postfix/smtpd[26684]: 3A0AB1C01543: client=localhost.localdomain[127.0.0.1]
    Mar 16 17:00:28 myserver postfix/cleanup[26624]: 3A0AB1C01543: message-id=<4F63B7F4.2050900@mail.myserver.com>
    Mar 16 17:00:28 myserver postfix/qmgr[13490]: 3A0AB1C01543: from=<web@mail.myserver.com>, size=1747, nrcpt=1 (queue active)
    Mar 16 17:00:28 myserver postfix/smtpd[26684]: disconnect from localhost.localdomain[127.0.0.1]
    Mar 16 17:00:28 myserver amavis[21490]: (21490-05) Passed CLEAN, LOCAL [192.168.1.220] [192.168.1.220] <web@mail.myserver.com> -> <myemail@servera.com>, Message-ID: <4F63B7F4.2050900@mail.myserver.com>, mail_id: 2Yyk4P8SpjER, Hits: -0.999, size: 1227, queued_as: 3A0AB1C01543, 6339 ms
    Mar 16 17:00:28 myserver postfix/smtp[26681]: DA35B1C014C6: to=<myemail@servera.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=6.6, delays=0.22/0/0.01/6.3, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 3A0AB1C01543)
    Mar 16 17:00:28 myserver postfix/qmgr[13490]: DA35B1C014C6: removed
    Mar 16 17:00:28 myserver postfix/error[26704]: 3A0AB1C01543: to=<myemail@servera.com>, relay=none, delay=0.15, delays=0.08/0.01/0/0.06, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to mail.servera.com[69.168.254.122]:25: Connection timed out)
    
    Maybe I should just go enjoy the weather which is abnormally, but fantastically warm, and come back to this Monday...
     
  9. Lancelot28

    Lancelot28 New Member

    [​IMG]Can you send email from A to B?
     
  10. 3DPeruna

    3DPeruna New Member

    Ok... so this is what I've got.

    A & B won't talk to each other, but I can send from out side (for instance Gmail) to A and B.

    Here's the setup:

    Cisco Router has a static IP of XXX.XXX.XXX.123
    Server A is behind the Cisco router with a static IP XXX.XXX.XXX.122
    Server B is behind the Cisco Router with a static IP 192.168.1.252, but NATed to XXX.XXX.XXX.124.

    Web services work great on A & B. Email is just fine on A. Email is fine on B. Except B won't talk to A and vice versa.

    I can't send mail to A or B. If I try to send from B to A, on server B I get:

    Code:
    Mar 19 17:31:39 serverB postfix/smtp[23088]: 340211C01594: to=<email@serverA.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.69, delays=0.14/0/0.01/0.54, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as B80CE1C0159E)
    
    Also, nothing shows in the logs on Server A when sending from B to A.

    When I send from A to B, on server A I get:

    Code:
    Mar 19 15:24:41 serverA postfix/smtpd[3997]: warning: XXX.XXX.XXX.123: hostname XXX-XXX-XXX-123.myisp.net verification failed: Name or service not known
    Mar 19 15:24:41 serverA postfix/smtpd[3997]: connect from unknown[XXX.XXX.XXX.123]
    Mar 19 15:24:41 serverA postfix/smtpd[3997]: BBAC71EA0047: client=unknown[XXX.XXX.XXX.123], sasl_method=PLAIN, sasl_username=email@serverA.com
    Mar 19 15:24:41 serverA postfix/cleanup[4000]: BBAC71EA0047: message-id=<4F679609.9000706@serverA.com>
    Mar 19 15:24:41 serverA postfix/qmgr[9943]: BBAC71EA0047: from=<email@serverA.com>, size=52240, nrcpt=1 (queue active)
    Mar 19 15:24:41 serverA postfix/smtpd[3997]: disconnect from unknown[XXX.XXX.XXX.123]
    Mar 19 15:24:42 serverA postfix/smtpd[4004]: connect from localhost.localdomain[127.0.0.1]
    Mar 19 15:24:42 serverA postfix/smtpd[4004]: 35B071EA0AB7: client=localhost.localdomain[127.0.0.1]
    Mar 19 15:24:42 serverA postfix/cleanup[4000]: 35B071EA0AB7: message-id=<4F679609.9000706@serverA.com>
    Mar 19 15:24:42 serverA postfix/smtpd[4004]: disconnect from localhost.localdomain[127.0.0.1]
    Mar 19 15:24:42 serverA postfix/qmgr[9943]: 35B071EA0AB7: from=<email@serverA.com>, size=52750, nrcpt=1 (queue active)
    Mar 19 15:24:42 serverA amavis[5714]: (05714-11) Passed CLEAN, [XXX.XXX.XXX.123] [XXX.XXX.XXX.123] <email@serverA.com> -> <email@serverB.com>, Message-ID: <4F679609.9000706@serverA.com>, mail_id: QDiV7azwhtUI, Hits: -1.205, size: 52240, queued_as: 35B071EA0AB7, 429 ms
    Mar 19 15:24:42 serverA postfix/smtp[4001]: BBAC71EA0047: to=<email@serverB.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.55, delays=0.12/0/0/0.43, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 35B071EA0AB7)
    Mar 19 15:24:42 serverA postfix/qmgr[9943]: BBAC71EA0047: removed
    Mar 19 15:24:42 serverA postfix/smtp[4026]: 35B071EA0AB7: to=<email@serverB.com>, relay=none, delay=0.14, delays=0.04/0/0.09/0, dsn=5.4.6, status=bounced (mail for serverB.com loops back to myself)
    Mar 19 15:24:42 serverA postfix/cleanup[4000]: 60C611EA0C3B: message-id=<20120319202442.60C611EA0C3B@serverA.com>
    Mar 19 15:24:42 serverA postfix/bounce[4027]: 35B071EA0AB7: sender non-delivery notification: 60C611EA0C3B
    Mar 19 15:24:42 serverA postfix/qmgr[9943]: 60C611EA0C3B: from=<>, size=3247, nrcpt=1 (queue active)
    Mar 19 15:24:42 serverA postfix/qmgr[9943]: 35B071EA0AB7: removed
    Mar 19 15:24:42 serverA postfix/pipe[4007]: 60C611EA0C3B: to=<email@serverA.com>, relay=maildrop, delay=0.1, delays=0.03/0/0/0.07, dsn=2.0.0, status=sent (delivered via maildrop service)
    Mar 19 15:24:42 serverA postfix/qmgr[9943]: 60C611EA0C3B: removed
    and on Server B:

    Code:
    Mar 19 17:40:35 serverB postfix/smtp[24568]: B80CE1C0159E: to=<email@serverA.com>, relay=none, delay=535, delays=505/0.08/30/0, dsn=4.4.1, status=deferred (connect to serverA.com[XXX.XXX.XXX.122]:25: Connection timed out)
    Mar 19 17:40:35 serverB postfix/smtp[24572]: connect to serverA.com[XXX.XXX.XXX.122]:25: Connection timed out
    Originally, I was trying to get a web site on Server B to use SMTP to connect to Server A to send emails, but nothing was working. As an alternative, I created some accounts on Server B to send to the Server A accounts, but those weren't working, either.

    There is something with how things are configured that keeps A and B from talking to each other on Port 25 (or 587)... but both can talk to the rest of the world.
     
    Last edited: Mar 20, 2012
  11. falko

    falko Super Moderator

    Do A and MX records for serverA.com and serverB.com point to the same hosts/IPs, or are they different?

    Have you tried inserting records for serverA.com and serverB.com in each server's /etc/hosts file (you can use their local IP addresses in that file)?
     
  12. 3DPeruna

    3DPeruna New Member

    A & MX records point to different places:

    ServerA A record points to the XXX.XXX.XXX.122 IP
    ServerA MX record points to ServerA (10 serverA.com)

    ServerB A record points to the XXX.XXX.XXX.124 IP
    ServerB MX record points to ServerB (10 serverB.com)

    I'll try adding each other to their respective hosts file.

    UPDATE: Changing hosts didn't seem to make a difference.

    UPDATED UPDATE: Changing hosts, rebooting on both machines made the difference. We're good now!
     
    Last edited: Mar 21, 2012
: php, postfix, servers, smtp

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