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Questions tagged [email-server]

Refers to the hardware or software that make up a server dedicated to sending and receiving emails. Many popular modern email servers bundle other functionality for contacts and calendaring along email delivery.

Refers to the hardware or software that make up a server dedicated to sending and receiving emails. Many popular modern email servers bundle other functionality for contacts and calendaring along email delivery.

A list of mail servers can be found on Wikipedia, though sendmail, Microsoft Exchange Server, Postfix, and Exim are the most popular email servers, which together control over 85% of market share for SMTP service.

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Force Dovecot not to log connect/disconnect messages

My /var/log/mail.log gets constantly flooded with Dovecot connect/disconnect messages like this: Mar 29 18:15:48 summit dovecot: IMAP(foo@bar.baz): Disconnected: Logged out bytes=63/2126 Mar 29 18:15:50 summit dovecot: imap-login: Login:…
squircle
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Do i need to open 25 port to send emails with the php mail function?

I have a Linux web app. Do I need to open port 25 to only send emails using the PHP mail function? If I have to open port 25, how can I disable receiving emails? Edit: I am asking because I understand that sendmail is the message transfer agent on…
Ben
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PostFix What Does "inet_interfaces " exactly mean?

I'm installing a Postfix Server and some people say that I have to change the inet_interfaces = all to inet_interfaces = loopback-only So now I am wondering, what does inet_interfaces exactly mean (and what is it doing) and what's the difference…
yama_HD
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Yahoo blocked emails after changing mail server public IP address

We have two exchange edge server and we want to change their public IP addresses. Changing one of the server IP addresses (and related DNS records) was done successfully and emails are delivered to all destinations except yahoo which returns: 421…
harsini
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How to setup a mailserver on Google Cloud VM?

I want to know how to setup a mail server like postfix on Google VP instance. I'm running Ubuntu 16.04 (and LAMP stack) and can't get the mail server to send email from website. I have installed postfix, and opened port 25, but no luck. Any ideas on…
sdfgg45
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Postfix: How to accept email with valid SPF but unresolvable hostname?

I have configured my Postfix to reject email sent from hosts without PTR record and hostnames that don't have A record. I found there are legitimate mail servers with valid SPF records which don't have A record for their hostname. As a result the…
LinuxBabe
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Postfix protocol error attempting email address validation with SMTP

I have some code that does an email address validation. It works by attempting a mail delivery via SMTP and then quitting without sending anything. It works most of the time, but in some fringe cases it does not. I have one of these cases and I…
mike nelson
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Postfix: content-filter vs. milter

I have a Postfix mailserver with content filtering using AMaViS via the "content-filter" option of Postfix. Now I wonder whether it would be better to use AMaViS as a milter instead of the contet-filter approach. Which approach is faster? / Which…
tex
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Postfix + Dovecot: Create send-only email account

I've got a nice little mail server setup (running Ubuntu Server 16.04) that works a treat. It uses postfix as SMTP, which uses dovecot (IMAP) as an authentication source for virtual mailbox users. It's been working fine, but now I have a second…
starbeamrainbowlabs
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Rewrite "from" for specific "to" addresses

We have a setup where postfix sends mails via Amazon SES relay. All is working fine except email forwards. While this topic has already been discuessed at least here and here, there are still some points which I can't wrap my head around. The…
kero
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Postfix sends to FQDN Hostname instead of Domain Name

I have installed a send only postfix. Postfix works when I send a mail to a full email address. However, if a mail to sent to a user, it adds the FQDN name as the extension instead of just the domain name I have set-up during installation. For…
Neel
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postfix/dovecot says "postmaster_address setting not given" but it is

I'm trying to configure postfix and dovecot to work together with virtual domains stored in MySQL, but I keep running into this whenever mail is passed from postfix to dovecot. Apr 26 11:54:40 smtp postfix/pipe[13165]: 20CCE1C30D5:…
Piku
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Perfect Forward Secrecy (PFS) for mail servers

Perfect Forward Secrecy is an important enhancement to SSL/TLS communications, helping prevent captured SSL traffic from being decrypted even if the attacker has the private key. It's easy enough to support in web servers, but it's also applicable…
Synchro
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How do I get Postfix to deliver ALL mail to a custom script?

I am trying to configure postfix so that ALL mail that arrives (to any domain) is piped into a shell script that I have. I have tried several things, including setting mailbox_command = path_to_my_script and this works, but will only accept mail…
Francis Rath
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Having trouble with DNS MX records

I've been reading this: http://www.zytrax.com/books/dns/ch8/mx.html For MX records, and I've setup my nameserver via bind. Here is my zonefile for my website: $TTL 86400 @ IN SOA ns1 root ( 2 ;Serial 3600 …
Jason
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