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Office365 error for bad SPF config but i already added

I am setting up a mail server but encountering issues with emails sent from Outlook. When I send an email from a Gmail account to my custom address (e.g., [email protected]), it works without any errors. ...
Yasha_ops's user avatar
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323 views

New user does not have a Postfix `Maildir` directory?

I am attempting to have multiple user accounts, each capable of receiving their own mail in their own Maildir directory. When I add a new user account however, no Maildir directory structure is ...
user10709800's user avatar
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459 views

How to correctly use Postfix virtual aliases?

All emails sent to my email server arrive in the inbox of root, regardless of the user specified in [email protected]. My virtual file in /etc/postfix/virtual is: [email protected] username1 query1@...
user10709800's user avatar
2 votes
0 answers
184 views

Mail Server and Google Mail

Issue I have just set up an email server using Postfix, POP3 and IMAP, following the instructions listed here: https://help.ubuntu.com/community/PostfixBasicSetupHowto Sending/receiving mail locally ...
user10709800's user avatar
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1 answer
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Does SORBS (DNSBL) contains domain names?

I’m researching SORBS (Spam and Open Relay Blocking System) and its function in DNS-based Blackhole Lists (DNSBLs). My question is straightforward: Is SORBS limited to storing only IP addresses, or ...
D.Bence's user avatar
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Warning with NO consequences: postfix/trivial-rewrite[]: warning: relay_domains lookup failure

I get the below warning in the mail log file. postfix/trivial-rewrite[]: warning: relay_domains lookup failure The mail server is working well without any issues. What can this error mean? Running ...
Senthil's user avatar
  • 499
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1 answer
223 views

Multiple MX DNS entries for mail server backup / redundancy?

I have set up MX records for my domain as follows: 0 mail1.mydomain.com. 10 mail2.mydomain.com. 20 mail1.backupmxserver.com. 30 mail2.backupmxserver.com. where entries 0 and 10 are for mail servers ...
neilalex's user avatar
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48 views

Sync cPanel mail server to Microsoft Exchange Server

we have Microsoft exchange server 2019 locally and have a cPanel for our mail organization account, we need both server we want exchange server send and receive from cPanel server via pop3/smtp or ...
RedOne's user avatar
  • 9
1 vote
0 answers
157 views

OpenSSL connection to an imap server over explicit port works, but fails on implicit port

I have a mail server to which I'm connecting from a ruby application using protocol IMAP. But I get an error in rails console: Loading dev environment (Rails 7.0.4) irb(main):001:0> @connection = ...
AnjK's user avatar
  • 111
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Forward outgoing mails to another port on home PC then to VPS and send it through VPS port 25

Hi I recently noticed it seemed my home ISP had banned me from sending through port 25 (I could send mails when my mail server just launched though). I tried to telnet to services like smtp.gmail.com ...
cyvb's user avatar
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Possible to configure my VPS as a proxy of mail sent by another mail server?

I have a NAS which deployed with a full-featured mail server, but I cannot send mail to most of the other mailboxes because its IP is always blocked from sending mail, and the mail sent will be ...
Cooper Max's user avatar
1 vote
1 answer
742 views

Postfix and Dovecot Virtual Mailboxes

I have been setting up a home mail server on my Raspberry Pi using Dovecot and Postfix. This is all very new to me, and I've struggled my way through. Now I'm on to trying to setup virtual mailboxes, ...
The All Powerful's user avatar
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1 answer
51 views

Certbot won't generate ssl for my mail-prefixed domains

I recently developed my first full-stack website, and I attempted to get it out there with a vps. My problem is, I can't seem to generate an ssl certificate for one of my domains. The www.website_name....
Ziyad's user avatar
  • 11
5 votes
2 answers
6k views

Running a Home Mail Server - What steps can I take to perform diagnostics?

I have been wanting to run my own mailserver at home for some time now. I don't necessarily absolutely need such a thing but it would be very useful to have as I am working running my own business now ...
user3728501's user avatar
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1 vote
1 answer
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Resolving DNS & MX Records

I am new to the community and I really need your assistance to resolve some complicated issues with DNS/MX Records. My client's website is designed and hosted in Wix with mydomain.com and pointing to ...
MasterVibz Infotainment's user avatar
1 vote
1 answer
393 views

Unclear about postfix and hostname in ubuntu

I need to preface this by saying I am in no means an expert with linux or servers. I have a digitalocean droplet that I am using as a webserver for a couple of domains. I am looking to implement a ...
Steve K's user avatar
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"This email is from an external mail server etc." <- can I get rid of this?

On many (but not all) of my incoming email messages, I see a message saying: This email is from an external mail server, be judicious when opening attachments or link My mail server is - ...
einpoklum's user avatar
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313 views

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 [email protected]. How is this possible? Are there any extra information that is sent in an email?
lpydawa's user avatar
  • 299
1 vote
0 answers
19 views

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, ...
Nik Mani's user avatar
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444 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 ...
Thomas W.'s user avatar
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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 ...
testesxi's user avatar
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0 answers
667 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 ...
Ders's user avatar
  • 103
2 votes
1 answer
2k 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. ...
Alexandre Paiva's user avatar
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1 answer
34 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 ...
Mike's user avatar
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0 answers
27 views

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. ...
Jinxzy's user avatar
  • 11
1 vote
2 answers
11k 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 ...
Paul Sinnema's user avatar
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1 answer
1k 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 ...
Paul Sinnema's user avatar
2 votes
1 answer
232 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 ...
Aman's user avatar
  • 23
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1 answer
43 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 ...
MarcoRos's user avatar
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1 answer
652 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. ...
Craig's user avatar
  • 219
1 vote
1 answer
468 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 ...
pjk_ok's user avatar
  • 111
0 votes
2 answers
375 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 ...
janasaiarun's user avatar
1 vote
1 answer
1k 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-...
MohammedSimba's user avatar
1 vote
1 answer
99 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 ...
Rollelaw's user avatar
0 votes
1 answer
2k 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....
Pankaj Kumar's user avatar
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2 answers
335 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 ...
MAk's user avatar
  • 1
1 vote
0 answers
621 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 ...
Jinxzy's user avatar
  • 11
0 votes
1 answer
53 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) ...
northkildonan's user avatar
2 votes
0 answers
701 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 ...
EffeBi's user avatar
  • 121
0 votes
2 answers
80 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" [email protected] -- -f [email protected] The problem is, the ...
Ben Marconi's user avatar
1 vote
0 answers
27 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 ...
Hubro's user avatar
  • 5,836
2 votes
1 answer
1k 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 ...
AhmedWas's user avatar
  • 196
0 votes
0 answers
1k 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 ...
sarahmdpr's user avatar
0 votes
1 answer
171 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 [email protected] instead of contact@...
capum's user avatar
  • 13
0 votes
1 answer
3k 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 ...
Rahul Singh's user avatar
1 vote
0 answers
462 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 ...
Chris Ca's user avatar
1 vote
1 answer
2k 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 ([email protected]) to my icloud email (@icloud.com) I receive this back: Mail from IP (my....
DiogoSaraiva's user avatar
0 votes
1 answer
47 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 ...
mustafa's user avatar
  • 814
0 votes
2 answers
419 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 protected] on 11/11/2014 11:37 AM Could ...
Egghead99's user avatar
  • 1,755
1 vote
1 answer
550 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, ...
Ali's user avatar
  • 160