Questions tagged [email]

The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.

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18 views

Postfix doesn't send mail

I am trying to learn about mail servers and am quite daunted by all of the moving pieces in the setup.. Currently I am unable to send via from my smtp server. I can receive mails fine from various ...
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POSTFIX: New mail server. Can neither send nor receive mail

I am trying to learn about mail servers and have setup one. However neither can I send, nor receive mail. I can login to my email account and I see the folders (Inbox, Sent, Trash, etc) are being ...
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Why Nginx Mail Module encoded '%' to %25 in Auth-Pass header?

I do the test with the special character password below ~`!@#$%^&*()-_+={}[]|\/:;"'<>,.? And I realised nginx mail module encoded the % to %25, but the rest of the special character ...
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Removing plain passwords from auth.log

I'm using some docker images to deploy a mail server (https://github.com/docker-mailserver/docker-mailserver). The MTA is postfix, with TLS configuration and using LDAP for login. I can login to the ...
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How to verify if an email was received and read

I accidentally sent an email to a wrong email address. The owner told me that he didn't receive my email because there were no email servers configured for that domain. However when I did MX lookup, I ...
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Switching from self-signed certificates to commerical TLS/SSL cert: will it work the way I expect?

New to the world of commercial certs, thanks in advance for any advice/guidance. Our only outbound service is email, hosted on MS Exchange 2016 (2019 in medium-term future). Internally we have several ...
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Bypass Microsoft Outlook IP Blacklist

Our hosting service gave us an IP which is in the blacklisted range for Microsoft. For this reason, no emails are being received by our clients that use the microsoft emails such as hotmail, outlook, ...
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2answers
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DKIM on subdomain hosted by domain.com, and auto-generated DKIM key

I've read a few different threads on here and have tried them out, but they don't seem to be working for me, so I'm hoping one of you awesome people can help me out. Forgive me, but this will be a ...
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Map a subdomain to an individual email address

say I want to redirect multiple subdomains to different email addresses So: *@it.example.tld --> it-support@mail.tld *@finance.example.tld --> finance@mail.tld *@hr.example.tld --> hr@mail....
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What is the purpose of the postmaster, webmaster, etc. email addresses?

I guess the following email address are frequently (if not always) used : postmaster@domain, webmaster, abuse, services... But what are their purposes ? Why create them ? Thanks :)
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Authorization failed when I try to log into gmail using fetchmail

After solving a small problem with starting fetchmail I am faced with another obstacle. This time related to accessing a gmail account through "fetchmail" I know it's a lot of stuff but I ...
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1answer
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Fetchmail does not use the indicated protocol

I'm trying to setup fetchmail for download some mail from gmail using pop3. The problem, as you can see, is that fetchmail instead of use the pop protocol will use imap. For being sure to not have ...
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Email sent from outlook but not receiving to recipient [closed]

iam able to send and receive emails from webmail but i have an issue with outlook. mails going to sent items folder but not delivered to recipients. there is no bounce back error getting. no issue ...
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1answer
50 views

How should I configure my hostname/FQDN for a multi-purpose VPS?

I recently got a VPS and have a fresh Ubuntu install, but I'm a bit confused as to how I should be setting up the hostname and /etc/hosts file if I'm wanting to set up an email server (Dovecot/Postfix)...
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108 views

Can an SMTP server tell the sending MTA to send to another address?

Can e-mail forwarding be accomplished with the receiving MTA responding in some way that tells the sending MTA that it should send the e-mail to another address, or must e-mail forwarding be performed ...
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Storing complete emails including linked images

In short, I need to store emails in their entirety; not just the headers, text, and HTML, but also any images linked to in the content. I currently have a mail server set up with Postfix and Dovecot. ...
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1answer
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Why does my postfix reject mail with a spf hardfail even though spf DNs record is set to softfail?

The log output I get is the following: "Jul 7 11:23:46 mail policyd-spf[19779]: 550 5.7.23 Message rejected due to: SPF fail - not authorized. Please see http://www.openspf.net/Why?s=mfrom;id=...
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1answer
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Balancing with MX records - How does this work?

enter image description hereplease can you help me with this, I have this scenario to balance email traffic, currently, most of the emails are going towards imail2.test.com.pe and imail.test.com.pe ...
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How do I make vacation autoresponding work for aliases?

We have an e-mail server on Ubuntu 18.04 running Postfix and Dovecot. How can I make vacation autoresponding work for our user's aliases? Example: Say our Deputy Librarian is theirname@ourlibrary.com ...
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Is the mail account compromised or is there any other chance?

The server was sending spam, now it is my task to clean it up. So did a few things which solved a problem, but this is still open. It seems that the owner receives mails from hisself. A forwarding ...
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Configure Postfix to prevent improper mail forwarding/duplication

I'm trying to reconfigure my Postfix mail server to stop it from improperly relaying mail to addresses that are listed as recipients but don't have my server's domain. Say my mail server's domain is ...
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Forward mail as specified in virtual.db with aliases

I have set up alias all@mydomain.tld for every user on my linux server in this format. all: username1,username2,username3 I also have set up virtual for forwarding all emails that come to server ...
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How to bypass the spam error after 20 mails?

I have a web app that sends bulk email to different clients. It generates custom invoices and sends those attachments via mail. But after 20 mails I get this error smtplib.SMTPDataError: (554, b'5.2.0 ...
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Base64 encoded MX records in TXT records

A lot of domains hosted by Namecheap contain strange DNS TXT records that appear to be base64 encoded, that when decoded look like a weird kind of MX record - having the structure of both a priority ...
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1answer
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Multipart text/html email from Invision Community not parsing correctly [closed]

First of all, yes I have contacted Invision Community support. Yes, I am a paying user with an active license. We went back and forth for several hours and all they have to say is there's nothing ...
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1answer
44 views

Mail Enable email headers when sending emails via ASP.NET

I have multiple websites running on my server: domain1.com and domain2.com The problem is now that when I sent an email via ASP.NET from domain2.com, that in this email source I see (notice domain1): ...
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1answer
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Null Client Mail Server

I want to set up a null client mail server, i.e. a mail server that sends e-mails, but does not receive e-mails. I tried multiple guides relying on postfix, checked discussions on this and other sites,...
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1answer
44 views

How do I create separate mailbox configurations per virtual user with Dovecot?

Let's say I have two virtual users: bugs@domain.tld and admin@domain.tld. I want the mailboxes for bugs to be configured like this...: mailbox Sent { special_use = \Sent } mailbox Drafts { ...
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Configure postfix after Mailman 2 to 3 migration

I'm new to postfix. Maybe someone can guide me towards a solution. I did the migration from mailman2 to 3 according to the official site, everything was imported correctly. However, I found that lists ...
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1answer
215 views

How to stop spammer spoofing my domain for emails

I've scanned all my code and even changed the passwords to my google apps account such that the SMTP password has changed. However, spammers are still sending emails from June24-eBay-USA-contactmsg-...
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i get email notifiy from rkhunter : “: No such file or directory”

I running ubuntu headless server 18.04 LTS and have set up mail notification for the rkhunter application and I get this message every day: Email-Subject: Cron <root@example.com> test -x /usr/...
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1answer
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Unable to send email to gmail account from my mail server

I've created a mail server and have setup a PTR record from the ISP to my static IP server. The mail server works well and am able to send and receive emails and send mails to many email addresses ...
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1answer
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Change only 1 emails DNS to use another server but keep the other ones in my server [closed]

So I came across a weird problem and I don't know if there's a way to solve it or not Basically, I made a protonmail.com account and changed the DNS servers in my cPanel to theirs Now, everything ...
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1answer
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Postfix wrong sender email

Hello my domain is example.com but when i use the mail command it sends the email with root@mail.example.com What did i missconfigure? Command im sending: echo "Test" | mail -s "Test&...
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Postfix 550 5.7.1 [closed]

I setup postfix and I am now trying to send an email using echo “test of email functionality” | sendmail MYGMAIL@gmail.com but I am getting a return email. The diagnostic code: 550-5.7.26 This message ...
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merge attachments from two emails into one?

Is it possible to merge two emails sent to the same address within a couple of minutes into just one email? I'm dealing with some software that sends invoices in one email and a statement in another ...
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Postfix: Delete specific emails

I'm using Postfix as an email relay between a windows app that can't authenticate with gmail and gmail. Every night between 12 and 1am this windows app sends a superfluous email that ideally I'd nuke ...
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1answer
43 views

Do I need to set a MX record with both my domain registrar & hosting?

I have a GoDaddy registered domain and am using the GoDaddy O365 email. I am moving to a different host for my website, so I have changed the A record in GoDaddy's settings to point to my shared ...
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1answer
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Cron: MAILTO for all cronjob notifications to an external address uses the wrong `to` header

My goal is to send everything that gets output from the cron daemon (no matter which crontab) to an external email address with the correct TO email header. I set MAILTO in /etc/default/cron to MAILTO=...
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1answer
80 views

Deliver mail to certain MX

We have a strange problem. Our Exchange (old guy Exchange 2010) server doesn't deliver mail to certain address. When checking I see that the domain of recipient has 2 MX records MX 10 good.server MX ...
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1answer
41 views

Access POP3 content from other computer

I have a tough mission, that I have no idea how to accompish it. In our company, all the e-mail accounts are configured as IMAP accounts, therefore we can access the e-mail from wherever. However, ...
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1answer
83 views

How to submission server of an email (SMTP)? [closed]

I will brief you about the situation I'm in, what issue I am facing and what I have tried. I have set up a web app using flask, where users can send automated emails (not email campaigns) to a list of ...
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1answer
46 views

Reverse DNS for multiple subdomains

We're setting up a system where each of our users gets their own subdomain of companymail.com for sending / receiving emails, and they can set up multiple mailboxes under that subdomain. We also want ...
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2answers
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Are MX record names important? [closed]

When creating MX records for a domain, is it important what they are called? I want to manage email through a remote service and have added the appropriate destination and priority. The service that ...
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1answer
116 views

Send As not Working sending from Outlook Client

Hey i set up a DL in office 365 and added members. I can send emails on behalf of the distribution group and it sends from office 365 but when i go to my outlook client i get an error that i cannot ...
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1answer
48 views

Postfix relay user if not found on local mail server

I have a particular need which seemed to be realizable with Postfix. I have 2 mail servers at my disposal. the first in a local linux server which is managed by Postfix with Dovecot the second ...
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3answers
211 views

Why is port 587 preferred over port 465 in SMTP?

I have recently been developing a C# client which sends emails via a SMTP server. However I have been as to what the different terms ment, like: STARTTLS/TLS/SSL... I had a faint idea of what they ...
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Implement Postfix Filter Loop Simple error “socket.error: [Errno 98] Address already in use”

enter image description here Fowllow this https://github.com/MiroslavHoudek/postfix-filter-loop to implement simple version of "Advanced content filter example" in http://www.postfix.org/...
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29 views

Restrict outgoing email from some subdomain to internal domains only using postfix

I am new to email servers and after some time and hard work I managed to configure a mail server, all the certs, all the ports etc... Everything is working really fine! And now I was requested to ...
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Using Office 365 with Linux mail clients

Our company is moving to Office 365. We would like to provide access to Office 365 from Linux workstations (Ubuntu 18) so that employees can keep their mails/drafts offline use a better GUI than the ...

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