All Questions
184
questions
0
votes
1
answer
94
views
Outlook timeout when adding IMAP account (dovecot, postfix)
I am adding a Postfix /dovecot mail server in Outlook 2016.
It works on my phone and I can successfully authenticate using:
doveadm auth test user pass
postconf -n
alias_database = hash:/etc/aliases
...
- 1
0
votes
1
answer
40
views
Can authentication with a relay be disabled for a specific address in smtp_sasl_password_maps?
Some email hosters are jerks. No matter your blacklist standing, SPK, DKIM, or DMARC, they will block your emails.
To deal with that, I've set up a relay using sender_dependent_relayhost_maps.
There ...
0
votes
1
answer
156
views
Can postfix enforce reject_unknown_helo_hostname before permit_sasl_authenticated?
I have a working postfix 3.5 relay where the config includes:
smtpd_client_restrictions = permit_mynetworks,
reject_unknown_client_hostname,
permit
smtpd_helo_required=yes
...
- 121
0
votes
0
answers
106
views
Postfix/Dovecot fails to send emails "SASL PLAIN authentication failed" - no further message
I have been all around the houses trying to configure Postfix and Dovecot so I can send through my domain from Gmail, which as far as I know is simply Gmail acting as a regular SMTP client talking to ...
- 235
0
votes
1
answer
214
views
Postfix - SASL Cyrus saslauthd authentication failed
Goal: Configure smtpd to authenticate connections by using postfix, cyrus, saslauthd, pam and mysql.
Investigation
Authentication via courier-pop3 & courier-imap using mysql works
saslauthd ...
- 1
1
vote
0
answers
94
views
Sasl connection refused
i am trying to run a selfhosted mailserver using postfix and dovecot.
firstly i configured only postfix without dovecot and that worked fine but i wanted to use a mail client so i installed dovecot to ...
- 11
0
votes
1
answer
289
views
Postfix / sasldb : "authentication failure"
I'm not a postfix expert... I'm having an authentication problem with posfix 3.5 on debian 11.8.
I've added a test user :
# saslpasswd2 -c test
Password: test
Using swaks to test authentication to ...
- 11
-1
votes
2
answers
639
views
Postfix smtpd and smtp restrictions (client, sender, recipient) first restriction that matches wins very ILLOGICAL for brute force attacks
if I have a list of restrictions for:
smtpd_client_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_rhsbl_helo dbl.spamhaus.org,
reject_rhsbl_reverse_client dbl.spamhaus....
0
votes
0
answers
162
views
postfix secure & insecure connections
I have configured postfix SMTP server for mail sending only with below configurations, I've used cyrus-sasl to authenticate with openLDAP, I want to achieve SMTP port 25 to use insecure connections ...
- 101
0
votes
0
answers
61
views
SASL authorisation and hostname to access the server
I have a working postfix mail server. It is registered under two DNS names: mail.xxxx.de and xxxx.no-ip.org. I use SASL via dovecot for relay authorisation. It works flawless when the client uses the ...
- 1
0
votes
1
answer
898
views
535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
I have Postfix installed on a Fedora 38 box with the following:
$ grep smtp_ main.cf
smtp_sasl_auth_enable = yes
smtp_sasl_type = cyrus
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
...
- 159
1
vote
1
answer
3k
views
Fail2Ban - Posfix-SASL not working
i have a problem that my fail2ban will not ban sasl authentications against my postfix.
This is an example log entry from /var/log/syslog:
Jul 31 13:42:21 v50428 postfix/smtps/smtpd[635398]: warning: ...
- 31
1
vote
4
answers
863
views
Postfix with Dovecot on Ubuntu 20.04 postfix/mail fatal: no sasl authentication mechanisms
Here's the output of doveconf -n:
# 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.7.2 ()
# OS: Linux 5.17.5-x86_64-linode154 x86_64 Ubuntu 20.04.4 LTS
# Hostname: mail....
- 11
2
votes
0
answers
302
views
Postfix SASL error: warning: unknown[xxx.xxx.xxx.xxx]: SASL LOGIN authentication failed: authentication failure
My use case is to use my own mail server to send emails from CCTV NVRs to overcome the daily limits imposed by GMail. The NVR has an option to setup authentication. The config worked for whitelisted ...
0
votes
1
answer
222
views
Postfix / Dovecot SASL authentication only working on primary domain
I have had a postfix server running flawlessly for three months now. Users log in to the server in their respective mail clients by connecting to mail.mydomain.com (with SSL) and there's never been ...
- 111
0
votes
1
answer
1k
views
Can PAM be used with Postfix and Dovecot SASL?
I have set up Postfix to use Dovecot SASL with PAM and Unix users, and Dovecot LDA (LMTP) for local mailbox storage. After some testing, turns out incoming mail gets declined with the reason:
Error: ...
- 143
1
vote
1
answer
711
views
How does SASL know to read config from /etc/postfix/sasl?
I've set up Postfix to authenticate with SASL on a Ubuntu based system. I've done this by following along with some recipes, but mostly readying a lot of the docs.
One bit that works, but which I don'...
- 498
0
votes
1
answer
2k
views
Postfix: reject_sender_login_mismatch not working
I want to use the following configuration for Postfix:
smtpd_relay_restrictions = permit_mynetworks reject_sender_login_mismatch permit_sasl_authenticated defer_unauth_destination, ...
- 267
2
votes
1
answer
2k
views
Postfix sasl_password file and MX resolution
Thanks to @AlexD idea, we'll implement the following transport table in order to simulate a IP failover using the DNS MX resolution (postfix 3.3)
Relay for 2 domains, exemple[12].com
exemple1.com ...
- 5,646
1
vote
0
answers
3k
views
Postfix unable to authenticate with Microsoft Exchange (No credentials were supplied)
I want to setup postfix on my nagios server to relay emails to our Microsoft Exchange server and I am running into issues with authenticating with Microsoft Exchange.
Specifically I am getting this ...
- 285
0
votes
1
answer
2k
views
postfix/sasl/pam (mysql) auth error
I've followed tutorial on http://flurdy.com/docs/postfix/ to set up an email server, and most of it works (after switching from Courier to Dovecot). Just not sending email through SMTP. Sending with ...
- 347
1
vote
0
answers
380
views
Postfix Can't Receive Internet Email - warning: SASL: Connect to /var/spool/postfix/private/auth failed
Using CentOS 8, I've setup dovecot and postfix and tested that:
I can sign in as an authenticated user
Read email (IMAP)
Send email to the same/different account on the server
Send email outbound, to ...
- 161
1
vote
1
answer
248
views
Trouble enabling mail_crypt in dovecot / SASL authentication failed
dovecot --version
2.3.4.1 (f79e8e7e4)
Ok, I tried to enable mail-crypt but it's being weird. I'm using https://doc.dovecot.org/configuration_manual/mail_crypt_plugin/#ec-key.
I ran:
cd $HOME
openssl ...
- 151
1
vote
2
answers
860
views
Dovecot not authenticating clients in mail server with postfix cyrus(for sasl authentication) and dovecot in centos 7
As I built a mailserver I have another question in process that I haven't been able to find in google so I am expecting I will get a answer here.
The update is I created a mailserver with postfix ...
- 23
0
votes
1
answer
356
views
mysql not authenticating with cyrus for postfix athentication
So i have been building a mail server and i have setted up postfix and a database now what i want is that cyrus should authenticate my users of mail server from a database i have setted up a database ...
- 23
1
vote
4
answers
4k
views
Postfix + sasldb issue (solved as of Mar 2021)
PS(SOLVED: Solution for Alpine Linux as of Mar 2021, the fix in cyrus-sasl 2.1.27-r12 is in edge branch. 3.13 only has cyrus-sasl 2.1.27-r10.
PS: I know there are similar posts but they are very ...
- 3,737
0
votes
1
answer
778
views
Postfix: How to malware & spam scan outgoing SMTP SASL auth users?
Although I have found two answers to this, I can't work out how to actually implement them, and at least one of them doesn't actually answer the question. So if anyone has any experience to share I'd ...
- 507
0
votes
1
answer
367
views
Postfix SASL authentication via Dovecot - Can I use the SASL login name in my postfix sql queries?
I have a mailserver with postfix, dovecot and mysql running on Debian buster.
Everythings works fine so far, but I would like to setup a scenario where the login name for SASL auth is different from ...
- 36
0
votes
0
answers
391
views
Demanding SASL authentication on port 25 rejects all of my incomming email
I am using this chunk of code inside /etc/postfix/master.cf to force people to securely "subimt" email through port 465 which uses protocol SMTPS. SMTPS supports mandatory TLS which I use to ...
- 403
0
votes
2
answers
763
views
Postfix fails on incoming SMTP from remote MTAs for local delivery
I am transferring MTA to newer servers running Ubuntu 20.04 LTS. SMTPS is working well thus permitting clients to send mails after authentication. However, when sending mails from remote MTAs for ...
- 222
0
votes
1
answer
126
views
Using "postfix" user for "dovecot"
I set the Postfix so that my mailboxes (maildir format) for my virtual users are set like this:
┌───┐
│ # │ root > myserver > ~
└─┬─┘
└─> ls -l /var/mail/
total 4
drwxr-sr-x 5 postfix ...
- 403
0
votes
1
answer
689
views
Postfix + SASL SQLite gives auxprop error on CentOS 7
I am receiving an unknown password verifier(s) auxprop error when trying to use SQLite for SASL authentication in Postfix on CentOS 7. It seems that the SQLite SQL engine is not found.
Contents of /...
- 1,475
0
votes
0
answers
855
views
Getting postfix to log to a file on docker
I have created a docker image based on Ubuntu 20.04 with postfix and dovecot. I also installed syslog-ng in hope to solve my problem, but it didn't work.
Thing is, I want to use fail2ban to prevent ...
- 200
11
votes
2
answers
31k
views
Postfix error, SASL authentication failed; cannot authenticate to server, no mechanism available
I would like to set up postfix relay to my website hosting SMTP server, from my home server. It's Centos 7, set up using dynamic IP and dynamic DNS. Because of limited space in my hosting site, I ...
- 113
7
votes
1
answer
3k
views
Postfix warning: SASL: Connect to /var/spool/postfix/private/auth failed: No such file or directory
I have searched, and failed to find an answer and I am out of ideas. I just do not know enough about postfix and dovecot to parse the configs or understand what may be causing this error.
warning: ...
- 71
0
votes
1
answer
2k
views
Dovecot: Username character disallowed by auth_username_chars: 0x0a
I'm trying to set up a postfix+dovecot server to use GNU Mailman for creating a mailing list server, however I'm currently stuck at setting up SASL authentication using dovecot. It seems to add a ...
user450390
1
vote
1
answer
2k
views
Can't telnet to Postfix SMTP server after adding smtpd_sasl_auth_enable option
I have the Postfix SMTP server installed on my CentOS 7 machine on port 25.
To test that it's working, I connect to it using telnet, like this:
# telnet localhost 25
and the result is:
Trying ::1....
- 1,552
1
vote
0
answers
31
views
SASL not blocking non authenticated user sending email to itself
My email server is working fine except that still allows anyone to send email from a [email protected] to [email protected].
I eanbled in /etc/postfix/main.cf
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/...
- 179
0
votes
1
answer
1k
views
Postfix How to send mail in behalf of an alias
I'm using postfix as a mail relay in a very simple setup, mostly with aliases, forwarding mails to GMail.
My main goal with this is to minimize the need for mailboxes on my server.
Let's assume I ...
- 101
1
vote
1
answer
4k
views
Unable to connect to port 993 for IMAP on Ubuntu server with Postfix/Dovecot/MySQL
Ubuntu 16.04.5
Apache2
MySQL
Postfix w/MySQL
Dovecot
SASL2
UFW
I am trying to install a working mail server and client on this machine. I followed this tutorial which allows authentication through ...
- 111
1
vote
1
answer
697
views
Postfix / Thunderbird / Cyrus SASL2: Username Or Password Invalid
I'm quite certain that I've entered my password correctly; that Thunderbird regards it as incorrect is I expect due to a Postfix or Cyrus SASL misconfiguration.
I am perpetually confused about eMail ...
- 111
0
votes
1
answer
418
views
Kopano LDAP unable to login when username has special character
Ok, so I currently have a Kopano server working with Openldap to manage logins. The problem I currently have is that if I decide to define a user's login as his email, I can't send a message via ...
- 121
1
vote
1
answer
291
views
Mail Server allow sending spam to hosted mailboxes
I got an issue on both of my servers (Postfix + Dovecot and one on Zimbra)
My issue is some robots send spam without login to our hosted mailboxes using the same FROM/RCPT.
It seems Google got the ...
- 297
2
votes
1
answer
3k
views
What is wrong with my SASL?
So the story goes: I have a score of CentOS 6.9 virtual machines, migrated to Microsoft's Azure cloud by VHD upload. Once deployed I found out that Azure doesn't allow to send out email directly from ...
- 150
1
vote
1
answer
4k
views
fail2ban cannot set iptables rules
I have only a thin knowledge of both iptables and fail2ban, but my mail server has a lot of incoming connections that I want to get rid of.
I have this config block in /etc/fail2ban/jail.conf
[...
- 11
2
votes
0
answers
1k
views
Postfix: How to use reject_sender_login_mismatch when using MySQL virtual users?
I want to force senders to use an envelope sender address that's identical to the SASL login username. From the Postfix SASL README I see I should list, in the smtpd_sender_login_maps option, a hash ...
- 690
3
votes
0
answers
733
views
Postfix: Enforce sender address for some users only
I am looking for an option to enforce an envelope sender address in postfix for selected users, only. E.g., I want to permit [email protected] to send mails as [email protected], only, while all other ...
- 81
0
votes
1
answer
600
views
Ubuntu Server - Postfix Issue
I have an issue receiving an email into my server here is what shows in the mail.log file:
Nov 1 10:50:30 hoskin postfix/smtpd[20806]: warning: SASL: Connect to /var/spool/postfix/private/auth ...
- 11
0
votes
1
answer
714
views
Postfix and dovecot. TLS not available
I've been trying to setup a send only SMTP server with postfix and dovecot, on Ubuntu 16.04. The problem I'm having is that when trying to send an email I get the message back.
4.7.0 TLS not ...
- 3
3
votes
2
answers
4k
views
Dovecot SASL auth not working
Like said, Dovecot auth fails when i try to connect with Thunderbird. Incoming and outgoing mail works fine.
I used e.g. this tutorial (and many more) as a reference: https://serverfault.com/...
- 31