Questions tagged [mail-server]

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How does a mail user agent know the name of the sender, if the email address does not contain the user's name

I received an email, and the sender's name is User X, but the email address is noreply@example.com. How is this possible? Are there any extra information that is sent in an email?
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Setting Protonmail on default email mobile phone app [migrated]

On my android samsung edge s6 I added a new protonmail account. The phone alerts me saying the server doesn't answer. Here the configuration I tried: IMAP server: 127.0.0.1,TLS,port: 143 SMTP server:...
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Transferring a working system drive from a linux server to new metal

I have a single drive linux mail server. I recently purchased a new server, can I move the hard-drive from the old system to the new machine and bootup? Since the kernel adds drivers during bootup, ...
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41 views

Multiple passwords for mail accounts used by multiple users?

Are there any mail servers that allow multiple users to access the same mail account, but each of the users with their own, specific password? The goal is that access to a shared mail account can be ...
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Proxmox Mail Gateway 6.0-4 free not quarantining spam

I installed Proxmox Mail Gateway 6.0-4 free as an antispam server for a mail server. It works fine, but except one thing. In the Proxmox Mail Gateway has an option Spam Quarantine. It is empty. I do ...
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62 views

“smtp;550 5.6.0. Sorry, looks like SPAM to me”

I'm applying for a tech support job and I got a test that I have a week to complete, so I assume they expect me to do some research for it, so, here I am :) I'm supposed to give my response to a ...
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90 views

Gmail as a SMTP outgoing mail server used in Postfix. Max limit is 100 emails a day. What is yahoo's or outlook's smtp max send limit?

I'm using gmail as an outgoing smtp server in my Postfix config in my server. The max limit is 100 emails sent per day. What is yahoo's and outlook's? Or is there another service that can do more than ...
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108 views

Synology MailPlus server reports many attempts to log in. Should I worry?

I've got the MailPlus server installed on my Synology 1618+. I receive reports from this server on a daily basis. What I see are a lot of attempts to log in to my server probably to use it as a spam ...
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397 views

Postfix setup for Raspberry Pi 3B+ (non-dedicated mail server, fantasy FQDN)

Problem: Create a contact form that lets users of a website submit messages that are sent to an email. Use php's mail() and Postfix. Having trouble using/understanding Postfix? The setup must be ...
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1answer
1k views

How to upgrade the Exim to version “4.92” on Ubuntu 18.04 server?

A critical vulnerability (CVE-2019-10149) was found in Exim mail server. It allows to execute some code on victim's server with root privileges. This vulnerability affects versions from 4.87 to 4.91. ...
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1answer
24 views

Guarantee email deliverability

We are using Zoho Mail in our company and so far the experience was great. But recently we have faced an issue of not getting our emails delivered to the new company we are now working with. One of ...
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Multiple mailservers

I am trying to find out if I am attempting the impossible. I have List item 1 IP on 1 cloud server 4 x Domains that I receive mail for 4 x SSL certificates I would like them all on one server. ...
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2answers
3k views

How to setup synology mailserver for outlook

I have installed the Synology Mailserver (not MailPlus) and would like to receive mails using IMAP. I've created the following DNS records sinnema.me NS ns1.isource.nl sinnema.me NS ...
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1answer
262 views

Error during creation of new mail system for MailPlus on Synology

I'm trying to install MailPlus Server on my Synology NAS but constantly get an error during setup. I can't find anything in logs etc. so it's a blackbox failing. In earlier tries it mentioned ...
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1answer
66 views

Looking for strict local mail server (no email sending and receving from outside world)

I am looking for a mail solution (or server) that work only inside an office and only employees inside the office can send and receive the email from each other. I don't want the employee to send ...
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1answer
40 views

external mail server desn't receive email to self domain

I have an external mail server that I use and works just fine. I have a website on another server with a php contact form that sends email to my own domain. The problem is that the server takes that ...
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1answer
349 views

How can I set up a DKIM DNS Record?

I currently run a website, hosted on a VPS. The software is Plesk. I have already setup an SPF Record and a DMARC Record, via the DNS Settings. I am a little stuck on how to set up a DKIM Record. ...
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1answer
118 views

Can I send emails to two different email clients from one mail server?

I currently have the Thunderbird email client on my Mac, which my business email goes to. Is there anyway of sending mail from my mail server to Office365 as well as Thunderbird? I'm not talking about ...
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2answers
62 views

Can we point MX records of a domain to IP?

I had a domain registered under go daddy with shared hosting and I want my mail server in a linode. Is changing my mx records to my Linode IP is sufficient or is there anything i need to add ? I want ...
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1answer
684 views

Dovecot's grace_quota is not working

My mail server is working on: Postfix 3.1 Dovecot 2.2.22 MySQL 5.7 Ubuntu 16.04 I configured for each user's quota to be read from the mail database users table from the column quota: dovecot-...
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1answer
38 views

Does installing Sendmail(using apt install) allow my computer to act as an email server?

I am new to networking and have installed sendmail to allow me to send mail via mutt. I wanted to know if by doing this I have allowed my computer to act as an email server, or if the sendmail ...
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1answer
917 views

What does it mean when I ping an IP from the terminal

I am trying to ping an IP from our machine but I am getting 100% packet loss when I do this for particular domain - cox.net for example - ping -I 199.106.175.128 gmail.com PING gmail.com (216.58.214....
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62 views

Moving Email to Specific Folder which are older than 7 days

Automated mails are getting dumped to my inbox. I have to move the mails which are older than 7 days to other folder in mailbox. How do i create create rule for the same.
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2answers
244 views

cannot ssh to server as I install poste.io on OVH dedicated server

I want to install poste.io with docker on my server . Poste.io & Docker installed without problem and running fine but when my connection dropped and I try ssh to server again, my connection will ...
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0answers
539 views

My mail server seems to be sending out spam and I am trying to find the cause

I have a mail server hosted with amazon aws. I setup the server on Ubuntu 14.04 with postfix & dovecot. I keep getting emails from mail delivery system saying mails are returned to sender that I ...
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1answer
47 views

newsletter mailservers - how to avoid blocklists?

I am working for a small company and we are sending out newsletter-emails to our customers like every 3 months. That are about 2000 emails every time. we are using our own (old access & outlook) ...
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0answers
667 views

Mail server Dns configuration

this is my question: I'm italian, i'have a local mail server and my new adsl company block 110 and 25 ports !!! I routed blocked ports from a VPS to my server by a VPN trunk without problems, but i ...
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2answers
50 views

Sending Email Directly From A Mail Server Terminal, How To Manually Specify Source IP?

Trying to send an email to my gmail account via the command line. I can issue the following command in terminal mail -v -s "test" xxxxx@gmail.com -- -f ooooo@mydomain.com The problem is, the ...
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20 views

Is it possible to tell Postfix to keep full emails for (e.g.) a week after they are sent?

Our mail server was recently blacklisted because a web server was infected with a spamming virus. We discovered and blocked the guilty sender only after we started inspecting the message bodies of ...
2
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1answer
640 views

Can I have different sessions with different servers for the same service?

As already known that one domain can have multiple IPs with multiple servers. So if I open for example my Yahoo account, then I'll have a session with one of Yahoo servers. My question: if like after ...
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674 views

Can't send or receive mails with Mdaemon

I have a Windows Server 2008 R2 with Mdaemon(v 10) installed. until today I have been unable to send or receive emails from/to any of provider such as yahoo, gmail, outlook, exchange... I have tried ...
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1answer
93 views

Run small mail server using a second domain instead of dynamic ip hostname service

How do I use a second domain instead of freely registered hostname, assigned to a dynamic ip address, in place of email address domain? something like contact@exemplo.com.br instead of contact@...
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1answer
2k views

Cannot connect to Google Compute Engine instance via SSH

i am new to google cloud,i just deployed my first instance it was working fine till yesterday, i used last time to set email server using this tutorial email server, but now i am unable to connect ssh ...
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382 views

Running Citadel Email on Raspbian Errors

I installed the citadel email server onto my raspberry pi. I can access the gui from my browser, but I can't send or receive emails. Whenever I send an email, I get the following error back 5 minutes ...
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1answer
1k views

How turn on SMTP Authentication?

How turn on SMTP Authentication? When I try to send a email from an email registered in my mail server (example@mydomain.com) to my icloud email (@icloud.com) I receive this back: Mail from IP (my....
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1answer
44 views

Avoiding Mail Server Inconvenience

We run our own web server (Apache on Ubuntu) for a bunch of non-commercial websites, but there was no mail transfer agent installed on it, since they are complex to configure and maintain. You need to ...
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2answers
387 views

Why does my mail server say it “Could not deliver the message in the time limit specified. #4.4.7”?

I'm trying to send an email to some people on my mailing list, and I got back a few NDRs, saying The following recipients cannot be reached: email@aol.com on 11/11/2014 11:37 AM Could ...
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1answer
386 views

Mail server that supports duplicate file detection?

AFAIK, Google mail servers (gmail) can detect duplicate files. For example, if you receive a big file as attachment that exactly exists in someone else's inbox, google avoids storing the file twice, ...
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1answer
64 views

E-mail Forwarding Server [closed]

I am looking for an e-mail server/client that does the following: Runs as an e-mail server (POP3, IMAP, Exchange, etc) for an isolated network Retrieves e-mail from the isolated network Resend ...
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2answers
4k views

How to block spam email by subject in zimbra

How can I block spam email by subject? I did tried following this, but it doesn't work. It uses custom_header_checks and define some parameters, I did try such parameters and restart the services but ...
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1answer
11k views

Fatal error (bad field count) while configuring Postfix

I'm using this tutorial to configure a mail server using postfix, dovecot and mysql. While configuring Postfix I have to uncomment the following lines and then restart Postfix with service postfix ...
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0answers
166 views

Thunderbird: Fetch new messages from server except imported messages

I am using Windows Live Mail for years, but decided to use Thunderbird. I use my mail clients with POP3 connection. I can import my WLM messages into Thunderbird via Import Export Tools and imported ...
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2answers
216 views

solution for sending/receiving emails from my own domain

since I am not into mailing yet - I wanted to ask the community. I got domains which are linking on several vServer / dedicated Server. I use those server in general for Webapplications & Hosting (...
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1answer
607 views

OSX Server.App Mail Server Not Starting

I'm having an issue that I've had before, but I've never come up with a solution. I have a Mac Mail server set up using Server.App, and occasionally the server will just stop working, and when I try ...
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1answer
207 views

Understanding Postfix and Courier IMAP

I'm setting up my own mail server, and I'm very new at this... and I'm getting lost. I need your help in determining some parameters the way I know them already, because the configuration is huge. So,...
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1answer
37 views

Unite mailboxes via ssh?

Mailboxes are plain text. As I understand, they have to be parsed and every mail begins with its header. I have multiple "mailbox synonyms", like "Gesendet", "Sent" and "Sent messages". Is the ...
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2answers
64 views

Mailserver standard filenames? [closed]

I have 3 mailboxes (gmail, 2 from univeristy) and 3 mailclients (apple mail, k9, thunderbird, evolution at work). Getting the clients to work together is a pain in the .... What are the names for ...
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1answer
92 views

DKIM configuration on Debian

Due to the fact that many e-mails we send with our company address do not get delivered, rejected or marked as spam, I searched for a solution on the web. One of the solutions I found was to use DKIM ...
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1answer
371 views

can not receive mail by own created mail from gmail

I want to create my own mail ID like myname@mydomain.in instead of paying extra to google for extra mail ids as I have already myname@mycompany.in. Things I have are mydomain.in(I paid for this ...
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1answer
81 views

What info can I get about mail server from email address?

I've made a little application for email parsing for a certain niche of business. That requires access to the user's email. I currently have a small settings menu where I ask the user to enter the ...