All Questions
1,593
questions
-1
votes
0
answers
59
views
Postfix Mail being redirected to private inbox
I am relatively new to Linux, setting up servers and especially handling mail related things. I've bought a new domain and rented a VPS, which now hosts my website. I need a more open environment for ...
0
votes
0
answers
7
views
Why does the SpamAssassin not insert some headers?
Trying to configure SpamAssassin 4.0.0 with Postfix 3.7.10 on Debian 12. I'm using spamass-milter 0.4.0. My /etc/spamassasin/local.cf has the following entries:
required_score 5.1
...
- 1
0
votes
0
answers
14
views
Multiple Postfix Instances *without* postmulti
I have been running multiple instances of certain services (php-fpm, mysqld, httpd) and am now trying to do the same with Postfix.
Searching online, I have so far only been able to find descriptions ...
-1
votes
0
answers
34
views
Postfix virtual mailboxes with only one single domain
I have read the Postfix documentation for virtual mailboxes but I can't find methods for my use case, with is shared domains, both UNIX and non-UNIX accounts, because I only have one domain. But ...
2
votes
0
answers
65
views
how to protect postfix mail from gmail spam [duplicate]
I am experiencing an issue with the BDIX (Local Bangladeshi server) server.
I have set up a mail server on the local BDIX server using postfix with aapanel.
I have configured SPF, DKIM, and DMARC in ...
1
vote
0
answers
23
views
Postfix configuration to block spammer domain isn't working
I have an Ubuntu 22.04 cloud VM with Postfix 3.6.4-1ubuntu1.3 installed that I largely use for receiving e-mails sent to addresses at my personal domain that I provide when signing up for less-...
- 117
0
votes
0
answers
14
views
How to route email in Postfix depending on both the origin and destination domain?
I have a Postfix server sending emails for a few different domains. Ideally I'd like to directly send all outgoing messages directly to their MX, as email should work. I have DKIM, SPF and DMARC, I ...
-2
votes
1
answer
40
views
How to run multiple email domains with port splitting? (like nginx proxy) [closed]
So im trying to make it so i have 2 domains, A.com, and B.com. they both use different email software (A.com has postal email server and B.com has modoboa) *something to also note, based on the ...
- 99
-2
votes
1
answer
54
views
Mail servers setup - HA
I would seek your expert guidance for this topic and your help would be really appreciated.
I want to setup mail service in my org in such a way that they are highly available and even if one of the ...
0
votes
0
answers
24
views
SPAM and SPOOF emails from postfix mailserver
I created and configured a postfix server, basically its an smtp-only server. I added the domain i want to use in postfix main.cf, and also added other domains in virtual file. I installed configured ...
0
votes
1
answer
54
views
Postfix body_checks rejected a message — how can I find out which regexp was fired so I can remove that from the filter?
I have a body_checks file for postfix.
Unfortunately I rarely, but sometimes important mails are not received, because they are rejected by the body_checks, although there should be no match. Here is ...
- 13
0
votes
2
answers
272
views
554 5.7.1 Relay access denied - cant send mails
I tried to upgrade debian from 10 to 11 and the everything got messed up. Im trying to fix postfix. I can receive emails but cant send. I get the error "554 5.7.1 Relay access denied"
My ...
- 11
0
votes
2
answers
33
views
postfix error handling to not lose the mail
I have a website with a form. When submit the form php sends a mail to a local gateway.
php code looks like this:
$ok = @mail($emailData['to'], $emailData['subject'], $message, $emailData['headers']); ...
1
vote
0
answers
94
views
How can I make MIAB automatically copy all mail sent via SMTP into the sent folder of the sender's account?
I run Mail-In-A-Box on my mail server and one of my clients is using a specialized application to send messages via SMTP from their account on my server. When they used their own Gmail account to send ...
- 11
0
votes
1
answer
80
views
postfix bounce_queue_lifetime and maximal_queue_lifetime
i have done a lot of research but still cannot clearly understand what is the difference between postfix bounce_queue_lifetime and maximal_queue_lifetime in main.cf. Although I've read a lot of ...
- 1
0
votes
1
answer
209
views
Email from any outside domain bounces back with 554 5.7.1 Relay access denied error
i have setup postfix 3.6 on my ubuntu 22.04 vps (cyberpanel) with dovecot and roundcube as my webmail. i managed to fix outgoing emails but now, i am getting relay access denied errors. this is my ...
- 1
0
votes
3
answers
262
views
Postfix sending duplicate emails under different userid's, how to fix?
I can't find a reason for it in the postfix settings, but duplicate emails are being sent, under different uid's. Looking at the email headers, they have unique ids, and each with a different Postfix, ...
- 111
1
vote
0
answers
89
views
How to make Postfix hand off emails via LMTP to Dovecot better (virtual vs relay)?
There are 2 ways how Postfix can hand off emails via LMTP.
The first approach is recommended by Kyle Dent in his book about Postfix. He suggests it in cases when we want to store emails in a ...
- 23
-1
votes
1
answer
337
views
Sending email with postfix on a specific IP address fails. Error 81126 with Gmail
Recently, I started to receive errors from Gmail:
host gmail-smtp-in.l.google.com[142.250.110.27] said:
550-5.7.25 [X.X.X.X] The IP address sending this message does not have
a 550-5.7.25 PTR record ...
- 109
0
votes
1
answer
49
views
How to send email from smtp server1 to smtp server2 (Postfix) via client?
How to make server1 with postfix can send email to server2 with postfix by redirecting DNS query to it (type forward). These servers are on the same local network. Server1 is to receive a non-...
- 1
0
votes
2
answers
280
views
Postfix/Dovecot presenting default SSL certificate from Apache to Thunderbird client
I've been struggling with this issue for some time now.
I want thunderbird to get the certificate for mail.******.cl, but it always seem to get ******.cl.
So I've done a couple of tests, and realized ...
0
votes
1
answer
190
views
Postfix+Dovecot: emoji in subject from command line break the delivery ("SMTPUTF8 is required, but was not offered"), works from Gmail
Tl;dr: if I send an email to my Postfix+Dovecot server with the subject containing UTF-8 characters
email from Gmail => Postfix+Dovecot deliver the email correctly
email from mail (command line) =&...
-4
votes
1
answer
196
views
How do I view mail (postfix?) configuration settings?
I inherited a server that is mailing status messages via an external mail-server. It runs crontabs that run scripts that send mails. Example (simplified):
echo "disk free status 10GB" | ...
0
votes
0
answers
110
views
PHP PEAR Mail STARTTLS failed error 220 with postfix
I'm running postfix with dovecot. I'm trying to use the PHP Pear Mail package to send e-mails, but I can't get it to work. The error I get is this: authentication failure [SMTP: STARTTLS failed (code: ...
0
votes
1
answer
110
views
Something sends email to OpenDKIM even after purging it
I can't send email from my server using Postfix. The /var/log/mail.log has:
postfix/local[1803]: 59367CDB9: to=<[email protected]>, orig_to=<opendkim>, relay=local, delay=0.03, delays=0....
- 105
0
votes
1
answer
150
views
what comes first smtpd milters or cleanup in order of filtering in postfix?
Based on the documentation of the postfix (as stated here: 'https://www.postfix.org/SMTPD_PROXY_README.html') the smtpd milters should be used to filter the emails first and then the cleanup service ...
- 47
0
votes
0
answers
100
views
Dovecot not receiving mail while making use of vmail
Below is my current vmail configuration.
auth_mechanisms = plain login
auth_username_format = %n
protocols = imap lmtp
# Search for valid users in /etc/passwd
userdb {
driver = passwd
...
0
votes
1
answer
99
views
postfix sending only short messages ( emails ) but not long messages?
when I am sending a short email from "[email protected]" or any other email acc , the message is received well in the inbox of Gmail , hotmail etc , but if I send the message again with long ...
- 209
0
votes
0
answers
84
views
Issue with 'delay_reject=no' and smtpd_helo_restrictions in Postfix
In Postfix MTA, I have set helo and client restrictions with the DISCARD policy. But since setting delay_reject=no I am getting this error just after connect from for some clients (don't know if they ...
- 203
0
votes
1
answer
152
views
In postfix can I mention sender access map in client restriction?
It's a question out of curiosity rather than necessity. What should happen say I place sender access map inside smtpd_client_restrictions and also place client access map in smtpd_sender_restrictions ...
- 203
0
votes
1
answer
99
views
In postfix how parent_domain_matches_subdomains helps rejecting mail for subdomains?
Based on the standard configuration given in https://www.postfix.org/STANDARD_CONFIGURATION_README.html#firewall the parent_domain_matches_subdomains = debug_peer_list, smtpd_access_maps should help ...
- 203
1
vote
1
answer
176
views
Why is it advised to disable relayhost when hosting mail server behind firewall?
I am trying to setup an MTA. While reading documentation I came across "Standard Configuration" for Running Postfix behind a firewall.
I am confused on this part:
IMPORTANT: do not specify ...
- 203
1
vote
2
answers
46
views
Can I log when the message arrival rate exceeds the message delivery rate in postfix?
I am trying to implement a MTA, on reading documentation of the postfix I found a parameter 'in_flow_delay' whose description in sort says 'Time to pause before accepting a new message, when the ...
- 47
0
votes
0
answers
56
views
What is behaviour of opendkim while verifying an email with multiple dkim signatures?
I am trying to implement DKIM verification using Opendkim and postfix. The doubt I am struck by is what will happen if the email has more than one DKIM signature and one of them fails (as like failed ...
- 47
4
votes
2
answers
991
views
What is difference between using smtp vs relay transport type in postfix?
I am trying to setup MTA which should submit different intranet mail gateways based on the recipient's domain. For that I thinks transport_maps in postfix should be setup for selective domains; if ...
- 203
2
votes
2
answers
238
views
How to restrict based on combined usage of sender email and client ip address in postfix?
I have a MTA (postfix) with sasl implemented. I want that for a subset of users I can map their email address to a particular range of ips (separate for each email user). If a user tries to send email ...
- 203
-1
votes
1
answer
226
views
How to bypass postfix milters for certain users?
I am trying to set up an incoming MTA server using Postfix. I have specific requirements that some users' emails should not go through the milters. Is there any way this can be done in Postfix? One ...
- 203
0
votes
2
answers
358
views
Too many connect from unknown postfix
I am trying to set up an incoming email server by using postfix as MTA the issue I am facing is that there are too many 'connect from unknown' lines in the log. Can anyone help can I debug this issue? ...
- 203
1
vote
1
answer
310
views
Configure postfix virtual transport to deliver mail to arbitrary (local) addresses
I'm using Postfix in a very niche application with no inbound or outbound SMTP connectivity (other than via the loopback interface).
I would like to configure the postfix virtual transport to deliver ...
- 45.6k
2
votes
1
answer
342
views
What are the correct settings to enable TLS between Postfix and Dovecot via LMTP?
I am trying to get Postfix to forward mail via LMTP to Dovecot. This works fine when TLS is turned off in the settings on both sides.
Once TLS settings are enabled, Postfix connects via LMTP and ...
- 4,646
0
votes
1
answer
51
views
Cannot send e-mail to one account on server
I am responsible for administering a web and mail server which has a number of users with mailboxes which function correctly. I recently added another user as I wanted to set up a separate e-mail ...
- 1
0
votes
1
answer
206
views
Does LMTP support authentication?
Scenario:
A Postfix Server runs on a VPS with a hosting company.
A Dovecot IMAP server runs inside the office.
We want Postfix to push mail it receives to the Dovecot IMAP server, using the least ...
- 4,646
0
votes
1
answer
224
views
Postfix seems to be running and listening on the public network interface, but external clients cannot connect?
I'm setting up a new Postifx server on Debian 12. I've installed the Debian package and confirmed that Postfix is running, and is listening on ports 25,465, and 587.
Postfix is running and there are ...
- 4,646
0
votes
0
answers
95
views
Postfix+Dovecot: filter email with certain `To:` address
I have a postfix+dovecot email server. There is one mailbox that was used by the Procurement department in many online shops and the address got disclosed and included in a spam list.
I would like to ...
- 123
0
votes
2
answers
93
views
Postfix : change email from unix_user@domain to a something@domain
I have two domains on a server, they are rarely used and they have 2 ubuntu users like
domain1_user
domain2_user
and I want to associate email addresses like
info@domain1
info@domain2
Obviously I ...
- 1
3
votes
1
answer
519
views
How to make postfix sign non-delivery notifications with DKIM?
I have set up my "postfix" server to sign outgoing messages with DKIM and verified that it works correctly for SMTP users using authentication. However, "non-delivery notifications"...
- 33
0
votes
0
answers
219
views
Postfix - Forward mail externally through relay
I manage the mail server for mydomain.com. Some users have a local IMAP mailbox, but for some their address is an alias and I'd like to forward their message to their external address. I've configured ...
- 101
1
vote
1
answer
255
views
Wrap plain text mail in html
we use Postfix as MTA to send our mails from our system. Unfortunately we have an old persistent system which we cannot change, which sends mails to our customers in plain text format. I would like to ...
- 15
0
votes
1
answer
89
views
can't get email from exchange to postfix
I configured a postfix mail server to receive emails.
I enable TLS as per security requirements as well as port 25 is banned by the provider.
I enabled both 465 and 587 with the following on master.cf
...
- 1
0
votes
1
answer
417
views
Postfix header_checks are ignored
I'm using Ubuntu 20.04. I installed Postfix (v3.4.13) with Dovecot (v2.3.7.2) a long time ago. Now, I want to overwrite the Message-Id header using header_checks. It's the first time I'm trying to use ...
- 1