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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.

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27 views

2 identical VPS (Ubuntu 18.04): Postfix - Alerts from Monit to Google mail is not working

Let's start from beginning. I have a two identical VPS servers with Ubuntu 18.04 OS and Monit installed on both. I configured mailserver on the monit (for sending alerts) configuration as a localhost ...
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14 views

Dovecot can't login Virtual user

Hello im running Linux <hostname> 4.9.0-11-amd64 #1 SMP Debian 4.9.189-3+deb9u1 (2019-09-20) x86_64 GNU/Linux Im totally new to setting up mailservers. I havesetup a postfix for SMTP and it can ...
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12 views

doveadm search - determine message path

I'm working on mechanism which deletes old junk/trash user e-mail. To do this I want to use doveadm expunge, e.g.: doveadm expunge -u xxx@yyy.zz mailbox Spam SENTBEFORE 2019-10-23 This will be "new ...
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1answer
37 views

Is there a way to use two separate mail hostname to send and recieve? [on hold]

I'm dealing with my own email server and i'm not allow to send emails out my same network, i mean, i can't send emails to gmail, hotmail, etc. So, i was trying to find some way to use an external ...
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45 views

Remove unnecessary quotes from sender display name with special characters

I have set up Postfix with Dovecot and SquirrelMail on an Ubunutu 18.04 machine. Everything is working great, except for the display name with special characters. In SquirrelMail, I have configured ...
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0answers
17 views

Can't send emails externally from Postfix, except to Gmail accounts [closed]

I am attempting to run an email server from my house (for fun, and to see if I can stop replying on Gmail) on a CentOS 7 machine. I used iRedMail to do most of the heavy lifting configuration-wise. I ...
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1answer
15 views

How many Emails can be Send Per Hour using Postfix [duplicate]

I have to send 12K emails per day, that means 500 per hour. I am willing to set up my SMTP Relay using Postfix. But I am confused about the Server Configuration (Power). Is it possible to send 500 ...
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1answer
19 views

How can I get msmtp to send system messages to my email?

I used to use ssmtp on Debian Stretch. Whenever there are system emails, they would get sent to my admin email. It was quite good because I would get a report on all my servers. This was true until in ...
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1answer
26 views

Forcing encryption for outgoing SMTP with Postfix *per User*

I'm trying to configure postifx smtp_tls_policy_maps so that i can set per user outgoing emails must be encrypted. One example is the email provider mailbox.org. As one can infer from the job ...
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1answer
93 views

How to debug “lost connection after STARTTLS”?

We have a web server which sends mail out via our Postfix relay over a LAN connection. Users from outside our network also send mail out via SMTP AUTH though that relay too. However, we have a ...
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19 views

Change Maildir location for Postfix

I'm currently using Maildir format for postfix and dovecot, but I not wanted to use it in home/$user/Maildir, I wanted it to be in the shared file storage like cephFS. My cephFS mounted folder is /...
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34 views

Problems to validate (trust) Letsencrypt certificate when connecting to mail server

I configured LetsEncrypt on Ubuntu 18.04, webs are ok, however, there is a problem validating (trusting) the certificate during sending email. It says it stopes at root certificate and cannot reach ...
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1answer
46 views

Postfix removes <user>@ from recepient email address when sending from localhost

I have setup a local mail server using Postfix for test purposes. I have followed this tutorial to setup a 'Local only' Postfix mail server and I have also installed Thunderbird for testing. The ...
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27 views

Setup ceph for storage mailserver?

I have read some article but none of them tell how to use ceph for mail server will be like. The most close to it: https://www.7layer.org/?p=313, but it was glusterFS So is there any different when ...
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27 views

Should I use GlusterFS for mail server?

I'm planing to use GlusterFS for my mail server. But I read that GlusterFS have problems with small file ( and mail are small files). What's the problems with GlusterFS when come to working with small ...
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2answers
38 views

Running VBA Code when an email is received - Cant easily use Outlook

Can I please ask for some support on this issue. Our client has an Exchange 2019 Server (Running on Windows Server 2019) They want to run some VBA code when an email is received to a specific mailbox ...
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38 views

Error installing MailInABox

I'm trying to install MailInABox but i have this issue Mail-in-a-Box Version: v0.43 Updating system packages... Installing system packages... Initializing system random number generator... Firewall ...
1
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1answer
89 views

DMARC Report: Sometimes DKIM Fails for Mail Server IP

What does it mean when some DMARC records indicate a failure for the correct server: <record> <row> <source_ip>1.2.3.4</source_ip> <count>8</count&...
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1answer
23 views

Drop newsletter emails with Postfix

There is an option, i have seen in Fortimail, that makes you able to filter/drop all newsletter emails. I don't understand how Fortimail detects these type of emails. And I am keen to know whether ...
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2answers
51 views

Email server: Remove rua from DMARC DNS entry or stop receiving DMARC reports

I have the following DNS entry for one of my clients email servers: _dmarc IN TXT "v=DMARC1; p=none; rua=mailto:postmaster@example.com" This is the only email server I'm administering, which has a ...
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0answers
47 views

Email goes to spam, even after all tests are passed, postfix [duplicate]

This is my email headers, I replaced my domain name with domainname Please help me find out what can be the reason. I also tested with https://www.mail-tester.com, it gives 10/10 score. Delivered-...
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1answer
243 views

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 ...
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1answer
45 views

Security Related to Send-Only Postfix Server

New Ubuntu admin here, trying to enable the PHP mail() function on my server. I have it working, but am wondering if my setup is secure... My [full] mail solution is as follows: 1) For incoming mail ...
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1answer
45 views

How can I check if a domain's mail server is hosted by me?

I do have a reseller package at TSO Host that lets me manage web hosting for other domains. At the moment I'm trying to figure out if a specific domain that once has been hosted is still sending/...
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0answers
47 views

Sendmail two-way SMTP integration

I have a special purpoice module (Processing module in the diagram), which accepts email via SMTP, processes it and then sends it out via SMTP. I need to configure Sendmail MTA so that every new email ...
0
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1answer
20 views

How to properly configure Domain Delegation to send email through one domain with a FROM address of another domain

We're having some email deliverability problems and I've tracked it down to a couple of issues: SPF/DKIM records are mismatched Our app is sending mail from one domain on behalf of another without ...
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2answers
38 views

Check if open SMTP connection is closed/timed out

Is it possible to send some sort of ping to a SMTP server to check if the connection is still open and ready to send a mail The connection is a keep alive and want to check if the connection is ...
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0answers
77 views

everything Pass but emails still go to the spam folder! I think it would be about hostname but not sure and don't know how to fix this

I checked too many topics and answers tested too many things! but can't find a solution to my problem. I'm a newbie user and maybe didn't understand some answers well. I need to fix this problem as ...
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1answer
148 views

What is the minimum web storage when creating a 500 user email accounts? [duplicate]

I have a client that needs a website and an email server. Web hosting provider nowadays offers a package of domain registration, web hosting and email hosting. Now, my client needs to create at least ...
1
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1answer
33 views

Schedule mail.box release of held messages

We're using Domino 8.5 and upon request, I'm studying the option of putting emails on hold outside business hours for some users. I can't schedule a task that stops the router and starts it on defined ...
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1answer
91 views

Mailserver sufficient to pass as non-spam with Gmail

I am coming to the point of thinking this is beyond my ability to accomplish. I have repeatedly built new servers on Digital Ocean (3 so far) with Postfix, Dovecot, DKIM, pretty much everything out ...
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1answer
66 views

AWS: How to properly set up mx record for website hosted on AWS S3 buckets?

I have a static website hosted in an AWS S3 Bucket. The website works fine. I've tried adding an MX record using '10 mail.domain.com' in every variation I can think of to write the record but I ...
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2answers
35 views

Postfix mail relay to external address, SPF Check

I have a question which is not about the configuration but about the question what is right and what not. The scenario: Organisation A (OrgA) has a Mailserver which is responsible for example.org. ...
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1answer
63 views

Is it safe to keep IMAP ports for public?

I have an email server which utilizes ports: 25, 143, 465, 587, 993. As far as I understand I have to keep ports 25, 465, 587 open to public for ability to receive emails. My whole network is hidden ...
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33 views

Receiving email from local services

I would like to purchase a VPS to run my Rails application on Ubuntu 18.04 LTS. I will send transactional emails using Sendinblue to allow users to activate their account. As server administrator, I ...
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0answers
49 views

One of recipients doesn't exist. Whole mailing is rejected by exim

We are using DirectAdmin + exim. While we are sending whole mailing to our recipients through Roundcube and one of it doesn't exist (for example s/he has been deleted mail address) we are unable to ...
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0answers
16 views

Email service migration from one provider to another

I am working on the email service migration from one provider(aplus) to another (GoDaddy). I have created the new email account at GoDaddy and completed migrating the emails from aplus's imap server ...
0
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1answer
65 views

Mail stuck in exim queue for no reason?

On my server, mail is sometimes delayed for apparently no specific reason. In this example two mails were generated by systemd-cron about failing cron jobs: mailq output (domains edited): 3m 1.9K ...
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0answers
58 views

Will enabling DKIM for gsuite impact sending emails from 3rd party sender like Mailchimp?

If I enable DKIM for my gsuite domain (mydomain.com) will it impact mails sent from noreply@mydomain.com via 3rd party senders like Mailchimp/Freshdesk etc? My understanding is enabling DKIM for ...
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0answers
14 views

Create a network with 2 postfix server

I'm trying to create a network with 2 postfix server (named mail1 and mail2). My goal is that the first server send mail to the second. So I installed postfix on 2 centos. When I try to do a simple: ...
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0answers
31 views

Sendmail and non ASCII characters in adresses

Does anybody know of plans for support of EAI and SMTPUTF8 in sendmail? I could find very little about it. On the same note, does anybody know if sendmail's development is alive/dead/comatose? The ...
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1answer
45 views

Cannot send mails to different domain with mail server in HostGator and website in Digital Ocean (From header is missing)

Recently I moved from HostGator with cPanel to a Digital Ocean droplet. I still want to use the email service from HostGator. So in DigitalOcean I added an A record pointing to HostGator IP, and MX ...
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1answer
92 views

Postfix refuses incoming mail from some (good) servers with 4.7.25 but they have correct reverse DNS

Scenario: This is a production mailserver since 4 years, with around 2000 mailboxes on ~50 domains, and works good with almost any other mailserver. Logs are constantly watched and the following ...
1
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1answer
327 views

No SMTP server defined. Use real server address instead of 127.0.0.1 in your account

We have an in house MS Exchange 2016 server. It has been running well for a few years now. This is happening more and more often. A user gets a kickback stating the email was undeliverable. There ...
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2answers
52 views

Is it possible to block email sender names in sendmail on CentOS?

We have been getting a lot of fake emails sent to employees acting like our CEO and our firewall is not capable of blocking specifically what we want. The emails come in from regular gmail accounts ...
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2answers
47 views

i cannot login to IMAP/POP3 from different location

[Please read before marking as duplicate] I have installed Postfix and dovecot on Ubuntu (for virtual Users). So i can login into the mail server from home using cellphone(mail app) and even on ...
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0answers
44 views

Linode postfix/dovecot/mysql mail server does not receive mail or work with IMAP

I recently set up a mail server on a CentOS 7 Linode, with all config according to this tutorial. After finishing setup, I used the mailx passage and sudo mail example@example.com to send an email to ...
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43 views

sendmail yesterday normal! Today receive but not deliver

yesterday i was receiving emails from my domain and directing it to the gmail server and others normally. Today he simply stopped delivering, he receives but does not forward. I'm using good old ...
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0answers
25 views

can't receive email in exim system

i have exim on directadmin system. then i had a little bit issue about external domain incoming email. that can't receive email (csd.hlag.com only!!!) it not such in the my inbox / junk or etc ...
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0answers
39 views

How to transfer Mail Server from Apple to CentOS using postfix

I would like to take the mailboxes from my apple server ("Old Server") and put them on my centOS server ("New Server"), without much if any downtime. They both have the same MTA: postfix. Now, not ...