Free and open source mail transfer agent (MTA) that routes and delivers email

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1answer
83 views

Unable to lock error message in SMTP Server

I've the following error message appeared 3 continuous for the same mailbox > (delivery failed to mailbox > /var/spool/postfix/vhosts/<user>/mail/inbox: > > unable to lock for ...
-5
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1answer
225 views

Mail remove by postfix Centos 6.5 [closed]

I use Postfix for sending local mails over another relay (gmx). But the gmx-Servers block my Mails with 550-Requested action not taken: mailbox unavailable 550 invalid DNS A/AAAA resource record. What ...
0
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1answer
96 views

Issue with receiving emails via Dovecot/Postfix

I'm trying to set up roundcube on my server which seems to be working fine. I have gone through all of the steps and it allows me to send outgoing emails perfectly fine (tested that with yahoo), ...
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1answer
78 views

postfix how to setup local domain users as virtual users

How can I set up local domain users as virtual users? I have setup virtual domain and the users but when I sent an email it keeps telling me "User not found". To test to see what the problem is, I ...
1
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1answer
220 views

cannot connect to postfix with a mail client

I have been trying to setup MX in my server and was able to get the IMAP part working under SSL using Dovecot, however I can't get the SMTP part working using Dovecot as the SASL Authentication. When ...
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0answers
25 views

Crond stopped sending e-mails for no apparent reason [duplicate]

I have a cron job that I want to run just once a day (executes a rake task), but while I'm testing it I have it set to run every 5 minutes. It was running perfectly fine this morning and sending me ...
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2answers
48 views

Open Postfix or Sendmail to all IP's

Can I configure Postfix or Sendmail to allow all IP's without authentication? I understand that this could lead to all sorts of abuse. We have some monitoring systems that send notifications out via ...
0
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1answer
88 views

Postfix acting as spam server. Looks like it's part of a botnet, spam messages being sent to customers [duplicate]

Let me first start out by saying I am no mail guru. If you need more info to help me just let me know. This week the mail server has been having all sorts of strange issues. It has been duplicating ...
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2answers
870 views

Use postfix and spamassassin packages on CentOS 6 to reject SPAM - without custom users and scripts

Here is what I'm trying at my CentOS 6.5 Linux server: Installed postfix and spamassassin packages Configured Postfix - it works well (I omit details here) Added -x to the SPAMDOPTIONS in ...
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2answers
51 views

Dovecot/Postfix cheat on an email that I wrongly received

I played with /etc/aliases and received the email of a coworker. I would like to put it back on his mailbox. Is there a way to do that cleanly ? I don't want to transfer the email, and if possible if ...
0
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1answer
29 views

Postfix accepts unauthorized requests

Here is an excerpt of my Postfix configuration: broken_sasl_auth_clients = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_sasl_auth_enable = yes smtpd_relay_restrictions = ...
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1answer
80 views

Rainloop: arbitrary sender address? [closed]

I just set up my mailserver (Postfix as SMTP and Dovecot for IMAP) and as web frontend I use Rainloop - which also works very well! My setup is that I have only very few real users (actualy at the ...
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0answers
97 views

Postfix: How to use a simple script to map recipient addresses 'virtual_alias_maps'-style?

I would like postfix to consult a simple (bash/python) script in order to find out (virtual_alias_maps - style) before-queue whether or not a recipient address it legitimate. E.g. i'd like to use mail ...
0
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1answer
911 views

Connect to private/auth failed: No such file or directory

I've setup postfix, dovecot and roundcube. receiving and sending email via roundcube is working as well as receiving emails via imap with another email client. But I'm not able to send emails with an ...
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1answer
96 views

Posfix pipe all incoming emails to PHP… NO REWRITING [duplicate]

I'm trying to get Postfix to pipe ALL email coming in on a specific domain to a PHP script. So far I've been able to do this via a tutorial I found on the web and also editing the /etc/postfix/virtual ...
0
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1answer
124 views

Mails going to spam. Please see the details [duplicate]

My hostname is properly set up. Host file has proper entries. Mail header shows SPF pass. IP is not balcklisted. Mail body is also fine. Only thing don't have is DKIM setup. Now I have got two ...
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1answer
926 views

Postfix on CentOS 7 cannot authenticate against cyrus saslauthd

Postfix fails to authenticate against cyrus saslauthd. However, saslauthd itself is willing to authenticate. What am I missing? From syslog mail facility: Aug 5 14:47:26 centos7-msa-test ...
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1answer
113 views

Spam - individual user

I have a bit of an issue with a users inbox in that a lot of spam is getting through for him alone. We use Amavis/Postfix and SA in our mail setup. Config setup like this: Config: ...
1
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1answer
306 views

Postfix: sender-dependent-relay and mail for host

I'd like to extend my configuration of postfix to be able to receive mail for my domian. Currently, I've set up postfix as a smarthost which accepts mail after authentication and forwards it, ...
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votes
1answer
204 views

Postfix sends as hostname.domain.com instead of domain.com

I've been trying to set up a debian mail server running postfix, but when I try to send mail via mail example@outlook.com the recipient sees the sender as hostname.domain.com. The hostname it sends ...
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votes
1answer
221 views

Postfix cannot send to external domains

I set up my Postfix with a sasl link to a Dovecot user / domain database. Postfix is giving the following error message when trying to send mail to external recipients (internal are fine): Server ...
1
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1answer
94 views

Postfix message ID originating process?

Last night my postfix mail server(Debian Squeeze with dovecot, roundcube, opendkim and spamassassin enabled) started sending out spam from a single domain of mine like these: $cat mail.log|grep ...
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1answer
103 views

Ubuntu 14.04 Postfix Access denied

Sorry to write here I'm really using it as a last resort. I have recently got my hands on a dedicated server. I'm not good with linux (not at all), but I wanted to set up a full server (Web, mail, ...
1
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1answer
129 views

Postfix header_checks syntax (POSIX - Perl)

I am using header_checks in Postfix to rewrite my headers (for emails sent by Outlook through my server). Here is the part of the header I am trying to change : Received: from Raphasus ...
0
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1answer
283 views

postfix+dovecot store maildir format mail in /var/mail

I want to set up a mail server using postfix and dovecot, that stores mail using the maildir format, and I don't want any of these files to go in user's home directories. Wherever I search for how to ...
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1answer
306 views

How to setup SMTP server to allow mailing to any recipient? [closed]

I have a windows server, acting as a web server and mail server. For the mailserver I use hmailserver and works fine recieving emails but not so good sending emails because I cannot setup reverse DNS ...
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2answers
4k views

Emails not being delivered to server from certain mail servers: “domain has no valid mail exchangers”

I'm having trouble with a server that I administer. I've been told that a number of emails aren't coming through. These are consistently from certain people. Here's the bounce error that they ...
0
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1answer
128 views

Is there a way to send email using port 465 only? [closed]

I'm trying to send email via port 465 since my ISP has blocked the port 25. openssl s_client -crlf -connect example.com:465 EHLO example.com AUTH LOGIN sdgfsdgfdgdfg dfgdfgdf mail from: ...
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1answer
115 views

Postfix virtual mailbox base, uid, gid — good user and group choice?

I often see tutorials for setting up Postfix with the virtual mailbox delivery agent on Linux that instruct to create a new disabled-login user and group to own virtual mailboxes in ...
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0answers
199 views

How to exempt localhost from SMTP smart relay?

I've got a mail server (mail.mydomain.com) that has a relay set up as such: /etc/postfix/main.cf: # Smarthost relayhost = [smtpcorp.com]:2525 smtp_sasl_password_maps = ...
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1answer
71 views

How does an MX relay work, as in, how is my SMTP server supposed to use it? [closed]

I'm trying to set up a Postfix server (any other software would be ok for me as well). I don't have a static IP, and that can apparently be quite a problem for e-mail purposes: I managed to "send" ...
0
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1answer
78 views

Trac notifications (smtp) and Postfix

I've two separate ubuntu 12.04 servers. Runs Trac (homeserver/Dyndns) Runs postfix (VPS/staticIP) I configured trac to use TLS and connect to postfix server. Trac config: admit_domains = ...
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1answer
140 views

How to setup Postfix with Opendkim to automatically sign PHP emails?

I've found that: submitted emails are signed properly (ie those sent with MUA's like Outlook and Thunderbird) command-line sent emails are signed properly emails sent with PHP, in particular case ...
2
votes
1answer
62 views

Postfix: validate recipients on remote server

I'm using transport table to specif the nexthop for specific domain: Host A: /etc/postfix/transport domain.com smtp:[mail.host2.com]:25 Host A verifies local recipients with lookup table: ...
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2answers
147 views

I don't have Sendmail but port 25 is still using by Sendmail

I am running this command: telnet 87.106.xxx.xxx 25 And it says Trying 87.106.xxx.xxx... telnet: Unable to connect to remote host: Connection refused But telnet localhost is running properly. ...
1
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1answer
44 views

How to execute external programs in the lookup table mechanism?

I need to execute a custom algorithm via header_checks lookup. I have the configuration smtpd_sasl_authenticated_header = yes to see in the headers what user is sending the message, eg: Received: ...
0
votes
1answer
30 views

rDNS and hostname conflict

My server has 3 IPs: 2 for dns stuff for example 192.0.2.1 and 192.0.2.2, and one that I use for outgoing email, let's say 192.0.2.3. My hostname is mail.mydomain1.com. The problem began when I ...
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votes
1answer
425 views

Postfix insists use port 25

I have a VPS server LAMP and all it works normaly. But when I try send a email to external server (outlook.com), this error occurs (visible on postfix log): Jul 23 18:15:00 serv postfix/smtp[1792]: ...
0
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1answer
492 views

Postfix still complains that “certificate verification failed” even when “smtp_tls_security_level = fingerprint”

I'm attempting to use Postfix (version 2.6.6 on RHEL6) to connect to and send mail via a mail relay on our internal network. I want to connect with STARTTLS on port 25 (port 465 is not available on ...
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votes
1answer
92 views

Swiftmail cannot use sendmail/postfix

When I try to run some Kohana swiftmailer I get the following error in maillog: Jul 23 17:18:37 ads postfix/sendmail[5818]: fatal: execv /usr/libexec/postfix/smtpd: Permission denied The output of ...
1
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1answer
174 views

How to set up the routing mail server with public static IP interface and private IP interface

I a building an email server that will use Postfix for SMTP, and Dovecot for IMAP. This server will have two interfaces: wwan0 - this interface has a static public IP address, and will be used by ...
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votes
1answer
287 views

Unexpected failure, please try later (in reply to end of DATA command)

while trying to send emails to the following address some_user@f-gs.jazztel.es i always get the following error message. Could any one tell where can i look in order to find what's going wrong? This ...
2
votes
2answers
294 views

(Postfix + Dovecot) All emails to @aol.com being deferred

I'm running a dovecot/postfix mail server on debian and am having some issues. Everything is working fine except all emails to @aol.com are being deferred. The error code gave me: "The Reverse DNS ...
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1answer
607 views

Postfix 5.7.1 Unable to relay [deliver internal mail directly]

I have the following scenario: serverA = RHEL5 using Sendmail serverB = RHEL6 using Postfix serverC = RHEL6 using Postfix gwsmtp = relayhost example.com = domain name As we are migrating from ...
1
vote
1answer
75 views

Postfix/dovecot remove LDAP user

I have to remove or blacklist an LDAP/dovecot user. The authentication is setup from active directory what I cannot manage so I thought there should be a way at least to disable this specific user on ...
3
votes
2answers
2k views

How to rate limit outgoing SMTP connections for Postfix

I have a postfix instance running on a VM. The VM provider shuts us down if we exceed a threshold of SMTP connections per minute - something like 10. In a typical day we might send 1000 messages, so ...
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2answers
201 views

Spammer spoofed localhost? Or server fail? How do I secure against this?

I noticed a spammer got through postgrey AND SpamAssassin, which was very strange. I examined /var/log/mail.log and saw some suspect lines: Log below, or on Pastebin: http://pastebin.com/k7sKnvGE ...
1
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1answer
70 views

how to handle this case if fetchmail fetches spam from yahoo, and postfix does not deliver because host does not exist

I have fetchmail collecting from yahoo and passing the mails to the local postfix server. If I have a 4xx Error , because for example the sender domain does not exist, fetchmail will try to pas this ...
0
votes
1answer
47 views

Allow account to exchange email with admin only and hold/redirect other incoming messages

We offer hosting service to some clients and have a mail server with postfix using the virtual transport, for virtual domains. I have a weird request from my boss: The idea is that late paying ...
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0answers
66 views

emails are coming from localhost instead of php sendmail_from

I'm trying to understand what I'm missing here. I have following PHP script: <?php ini_set('sendmail_from','XXX@XXX.TLD'); mail('YYY@YYY.TLD',rand(),rand()); ?> ... and even though I set ...