All Questions
19 questions
1
vote
0
answers
56
views
SASL authentication - first local and then AD in postfix
I am trying to setup sender access maps for restricting mail from address. However want to allow specific users to use different mailfrom.
Users are authenticated by sasl (AD authentication configured ...
- 11
1
vote
2
answers
442
views
Is my connection to my Postfix server encrypted?
I would like to use my Thunderbird client to send mails trough my Postfix server running on port 25 (SMTP).
I would like an authenticated and encrypted connection.
I followed these documentations:
...
- 113
10
votes
1
answer
15k
views
Postfix using OAuth2 authentication for relay host
I tried to set up postfix with Google as its relay host but failed
miserably.
Google switched to OAuth2 authentication and deprecated other authentication
methods. This is why I tried to use the new ...
- 241
2
votes
1
answer
2k
views
Warning in the logs of Postfix: "restriction NNN ignored: no SASL support". But it does have SASL support
I have postfix + dovecot + pgsql. All has been working. Recently I've changed something in the config to combat spam. Now I see this in the logs:
localhost postfix/smtpd[2299]: warning: restriction `...
- 239
0
votes
2
answers
2k
views
Postfix configuration issue with fips on centos 7; mailgun relay
I am trying to setup postfix to relay all mail generated on the local machine via SMTP to a mailgun relay. I have used the mailgun relay before with success on an ubuntu server, but I am migrating to ...
- 141
1
vote
1
answer
1k
views
Cannot connect to SMTP server [closed]
I'm unable to establish a connection to my server's SMTP server, it gets closed immediately.
telnet x.x.x.x 25
Trying x.x.x.x...
Connected to xxxxxx.xxx.
Escape character is '^]'.
Connection closed ...
- 223
0
votes
2
answers
5k
views
Dovecot not listening on imap and pop3 ports
Before I continue, I have looked at tons of posts online about saying that the protocols are not setup, and have tried what they have offered, but all of them do not help, and don't seem to resolve ...
- 103
1
vote
1
answer
3k
views
SASL authentication failure: client response doesn't match what we generated
The following tutorial has been used to setup a virtual mail server:
How to set up a mail server on a GNU / Linux system
Everything works fine, though every time a message is being sent the ...
- 21
0
votes
2
answers
3k
views
postfix & cyrus-SASL SASLDB2 0: NO "authentication failed"
We are setting up a Postfix mail relay to accept only authenticated smtp sessions and forward them to our backend smarthosts.
CentOS 6.8
postfix-2.6.6-6.el6_7.1.x86_64
cyrus-sasl-lib-2.1.23-15.el6_6....
- 101
1
vote
1
answer
4k
views
Postfix + dovecot, disable authentication on port 25 [duplicate]
I use postfix 2.9.6 on ubuntu 12.04 (with dovecot if that matters).
I'm trying to disable auth on port 25 and only allow it on port 587, so that I can receive mails normally from other servers but ...
- 11
1
vote
1
answer
2k
views
Postfix using a RESTful API for authentication
Is it possible to connect Postfix to a RESTful API to validate password/username?
What I imagine an ideal scenario is if Postfix handled the LOGIN or PLAIN methods (behind TLS only, but that is ...
- 123
0
votes
1
answer
117
views
Does default postfix installation support ssl and sasl2 Linux Mint (Ubuntu)
I am trying to setup a postfix mail server locally only to send mails on Linux Mint 16. I was successfully able to send mails to non TLS MTA, but not to gmail. Later I found that I need to configure ...
- 101
1
vote
0
answers
2k
views
Authentication failure with postfix and sasl using sasldb
I'm really not sure what my issue is. I've checked several guides, and I am sure I have set this up correctly, including config fails, restarting the service, permissions etc. OS is Ubuntu Server.
...
- 71
3
votes
0
answers
3k
views
Postfix SMTP client won't authenticate with AUTH LOGIN
Log extract:
127.0.0.1[127.0.0.1]:11127: 250-AUTH LOGIN PLAIN
maps_find: smtp_sasl_passwd: hash:/etc/postfix/sasl_passwd(0,lock|fold_fix): [127.0.0.1]:11127 = XXXX
smtp_sasl_passwd_lookup: host `127....
- 131
1
vote
0
answers
290
views
IMAP login not recognizing SASL while simple postfix send is
I've got SASLAuthd working (via LDAP), and am also successfully able to telnet via port 25 with my LDAP credentials. Postfix is configured with Dovecot. All 3 services are running fine (Postfix, ...
- 93
0
votes
1
answer
2k
views
Ubuntu Postfix Open LDAP integration - no SASL authentication mechanisms
Ive followed all the steps in https://help.ubuntu.com/community/Postfix/DovecotLDAP
but I am getting a
localhost postfix/smtpd[12520]: fatal: no SASL authentication
mechanisms
in my /var/log/...
- 93
3
votes
2
answers
5k
views
Why doesn't Postfix reject a specific client's connection attempts?
My SMTP server is being probed. It looks like a brute force attach on SASL, where they're going through a password dictionary.
Having seen thousands of these lines in the log files
Sep 18 14:09:52 ...
- 133
14
votes
1
answer
42k
views
Postfix: disable authentication through port 25
When using Postfix and IMAP on a mailserver, at least 3 ports are usually opened
25 smtp : incoming emails from anybody (whole internet)
465 smtps : outgoing emails from authorized users (to the ...
4
votes
3
answers
6k
views
Appending a pem to another
I found a blog that helped me relay postfix through smtp.gmail.com with SASL authentication. One of the steps was:
cat /etc/ssl/certs/Thawte_Premium_Server_CA.pem | \
sudo tee -a /etc/...
- 2,511