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Questions tagged [email]

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

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1answer
13 views

Using both GSuite and third party email hosting

Is it possible to use 1 domain that running simultaneously with 2 email hosting / services? I mean in my company, a management level will using g suite. On other hands, a staff level just using email ...
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0answers
9 views

Exim default sender address

I would like to set a default MAIL FROM address for my Exim MTA in order to not specify it explicitly when I send an email. Currently, I send an email like this echo 'test mail' | mail -s test -r ...
4
votes
1answer
45 views

DMARC test failed but we didn't find any obvious reason why; DMARC not passing while SPF and DKIM do

About 7 days ago, I found out on https://www.mail-tester.com that sometimes (50% of my tries over a couple of days) my company email does not pass DMARC test. As it states it does not know why, I am ...
1
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0answers
12 views

Delivery Status Notifications not being retried

I was checking my ISP's Out of Office reply system and I found that although they sent a message to my server, because my server replied with a 4xx error code, the server did not attempt to re-deliver ...
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0answers
25 views

Updated MX Record Causing Bounce

We recently migrated our company to a new mail provider (Gmail), and updated our MX/SPF/DKIM/DMARC records. Checking the DNS propagation via https://dnschecker.org/, all changes are reflected. ...
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1answer
40 views

server listed in backscatterer twice in 2 months [closed]

My server was listed twice in a 2 months time window in backscatterer.org blacklist, for a low severity. I'm not finding anything about the reason of blacklisting. Would there be anyone to help me to ...
1
vote
1answer
43 views

FreeBSD: system is sending mail for any user to an external smtp - why?

There is a problem with one of my jails. All Jails sending their mails for root to root, except one jail (nginx). This jail sends mails to root@jailname.domain.tld. My Postfix is configured to accept ...
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1answer
27 views

OpenBSD 6.5 /etc/mail/aliases correct format?

What is the correct entry format for an alias? Right now I have root: xxxx@somewebsite.com Running newaliases -f /etc/mail/aliases yields a syntax error. Are there examples in the manual page ...
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0answers
29 views

Configure postfix mail server with outlook or Thunderbird mail client

I have successfully configured my email server with digital-ocean ubuntu 18.04 LEMP droplet and everything work fine so far. I can send & receive email and also successfully configured with round-...
0
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1answer
49 views

How to create email list in exchange 2010

I would like to create some kind of email list in exchange 2010. From user side, it will look as something like this when they create message: Group_1 Group_2 Group_3 When user click on the list ...
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0answers
8 views

IMAP email not persisting read status and reply status - what could be the likely cause?

So I have the following setup: IMAP mail from TransIP (a pretty big host in the Netherlands) Thunderbird on my PC Mail on IOS phone Frequently when I'm reading emails on my PC they are being marked ...
-1
votes
1answer
39 views

Is it possible to receive mail on the internet without an MTA? [closed]

I just need to be able to receive email on my Debian server, not send it. How can I do this with the lowest memory/CPU footprint? Do I still need a full MTA?
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0answers
24 views

Reverse DNS Not Working on some Email servers

We host our email on an internal server. Recently we have started getting bouce backs from various other servers. Most seem to have the following error: Reason: Remote SMTP Server Returned: 550 ...
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0answers
26 views

What does gmail response “Requested action not taken: mailbox unavailable (in reply to MAIL FROM command))” means?

When out of office mails from our company go to a gmail address, we get this error in return: May 2 12:59:29 lg-info-mail postfix/smtp[22620]: AB34490FD1: to=, relay=gmail-smtp-in.l.google....
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0answers
24 views

Postfix/dovecot can send, but does not receive mails

I have a VPS server, it worked like email server from 2015, but I reinstalled the Debian OS. (Old version 7.6, the new is 9.8) Before I reinstalled the OS, i backed up the postfix, dovecot, ...
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0answers
24 views

People complaining about undelivered emails - AWS says the provider returned SMTP 250 code

We have several users that complain about not receiving only some of the emails our webservers send through AWS Simple Email Service. Most of those users not receiving emails are users with hotmail.fr ...
0
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1answer
56 views

Email sending issue with “localhost.localdomain”

I have a DigitalOcean server which runs Ubuntu 14.04. I am having problems with sending emails from the PHP mail() function (which uses sendmail internally). I think the issue may be related to my ...
1
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0answers
18 views

Forword incoming email to all existing emails via .qmail

Is it possible to forward incoming emails to all other email adresses on the server? Let's say you have "office@example.org" and every employee shall also get the emails sent to this address. (Not ...
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0answers
19 views

Sieve Vacation Extension: Save Out of Office Replies

I have an SMTP + IMAP server on linux and use sieve filtering to provide some useful features. One such feature is out-of-office replies, provided by the following script: require ["fileinto", "...
4
votes
2answers
61 views

How to catch emails on subdomains

I'm making a website which uses the subdomain as part of its name, e.g. really.cool.example (not the actual site, obviously) and have really@cool.example as the support/contact email address. The ...
0
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0answers
29 views

What email headers are useful for determining if my email account has been compromised?

I've recently received a lot of spam replies (automated replies from users, and rejections from mail servers) to a certain email address. I've taken the obvious precautions of changing passwords, and ...
-4
votes
1answer
58 views

How is it that my postfix server can also be used without authentication? [closed]

Whenever I send an email via my Postfix server, I see this in the log: postfix/submission/smtpd: ehlo=2 starttls=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=8 That is, I have to authenticate ...
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0answers
49 views

postfix sender dependent relay and transport rules

in our system our exchange server can not do "sender based mail routing" so it sends all emails to a (redundant) linux system which should do sender based routing and also it does IP randomization in ...
0
votes
1answer
34 views

AWS Emails Sender-Verification Limit - An Email for each User

I am building an application that uses AWS for hosting. Additionally I use SES (Simple Email Service) to send emails. So far everything works fine. However the structure of my application requires me ...
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votes
1answer
55 views

Postfix receives email but doesn't send [new to server management]

As the title suggest, I'm struggling to get the mail server to send emails. I recently purchased a VPS for hosting and I'm currently trying to set up the mail server which can now receive emails but ...
1
vote
1answer
106 views

Postfix - Recipient Address Rejected on Incoming Mail Only

I am working on building a secure mail server for the first time using Postfix and Dovecot and I have encountered a problem that I cannot surpass. To avoid the email delivery in the spam box of ...
1
vote
2answers
40 views

Different password for Roundcube and external IMAP/SMTP

Is it possible to have the Roundcube password, and the password that's used for IMAP and SMTP connections (such as when using a mail app), be different? I would like to do this because I've set up 2 ...
0
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0answers
7 views

Exim4: Accept local and remote mail. Forward local mail to other account. Forward/relay remote mail from domain to other account

I have managed to setup two working configuration: 1) smarthost configuration that successfully forwards local mail to remote account configured as in /etc/aliases. Remote connection not possible. 2)...
0
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3answers
61 views

secondary backup mail server

I currently have my domain on CloudFlare which is set-up with my one and only mail server, what i want to do is make so the new incoming mails are saved on both my main and second server, i read on ...
2
votes
1answer
47 views

AWS SES dropping some emails frequently

Question: Would like some help on how to debug to find a point of failure where an email to be received by AWS SES might get dropped? (Please note: Problem is related to receiving mails via SES ...
0
votes
1answer
35 views

How can I set up a local mail server and forward external email to another? [closed]

I would like to set up an email server, using Redhat 7.6, let's call it mail.domain.tld. The box is realm-joined to that domain. I want to create email addresses for domain users, for example fred@...
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1answer
78 views

PHP mail() function working from command line but not working with apache

My problem is that php script which has to send mail doesn't send it if I run it in browser, but works in cli. This doesn't help PHP's mail() function working in CLI but not in Apache In both /...
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0answers
32 views

IBM Domino - Add “Disclaimer” to Incoming Messages

I am a sys admin with a Microsoft background trying to figure out how to do something on an IBM Domino mail system. Server version - IBM Domino 9.0.01 fp 10 I want to add a "disclaimer" to all ...
1
vote
1answer
42 views

Sending email using a third-party smtp requires an mta?

I have a G Suite account and want to use the Google's SMTP to send out emails from my server. How can I then send emails from Linux's CLI? I read with some research that I need a program such as ...
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0answers
58 views

PowerMTA routing loop detected

I am facing with an issue, I have spent a day trying to solve it. Everything works fine except sending mail between mailboxes of the same domain configured as a virtualhost. Here is my configuration ...
0
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1answer
35 views

Mail cc originating out of nowhere

Today a bunch of users are including a strange email address with the email addresses they're actually trying to send to and a few got through with bounce messages as follows. The message ...
0
votes
1answer
42 views

How to quickly transfer email files from one server to another?

I was wondering what is the fastest way to transfer emails from one server to another, because i'm sure that i can get this done a lot faster than it is now. My servers are on the same location (...
0
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0answers
13 views

Sending email with read only root drive by using a tmpfs for /var/spool/nullmailer

I run a couple of debian servers, and I use nullmailer to send health and status notifications without a full mail server on each server. One notification I want is from smartd, when a hard drive has ...
0
votes
1answer
27 views

cdosys mail from classic ASP

I am supporting a customer running a proprietary Content Management System written in Classic ASP. Certain pages use the cdosys message routine to send email. This is used to report page errors back ...
4
votes
3answers
452 views

Can MTA send mail via a relay without being told so?

I'm thinking of adding an SPF to a domain. So I'm concerned if there are circumstances under which my MTA would use some relay when sending mail. Like, when the destination servers are too busy or ...
1
vote
1answer
49 views

Exchange 2010 interprets display name incorrectly

I've been investigating an issue with emails showing up in outlook as first.name@ (without the email address), and it seems the email address is being sent as the display name like so first.name@...
0
votes
1answer
40 views

doveadm backup doesn't transfer mail from root INBOX

I'm trying to migrate IMAP mails from dovecot 1.1.20apple0.5 (osx) to dovecot 2.2.33.2 (ubuntu). I'm using "doveadm backup" to migrate my data. It works fine for all subfolders, but the root INBOX ...
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0answers
49 views

My Postfix is rewriting From: header for incoming emails with bad From headers

I received some phishing emails, and the From: header contained ONLY a display name. Like : From: Timmy Tester Postfix then delivered the email, but appended its hostname to FIRST PART of the ...
-1
votes
1answer
55 views

Email server multiple domain with different IPs

I have 2 domains: ex1.example with IP 192.0.2.1 ex2.example with IP 203.0.113.2 On ex1.example I installed postfix and dovecot with support working on multiple domains (MariaDB with tables and other ...
0
votes
1answer
45 views

Centos mailx sending body as attachment

I've got a script I'm trying to send emails through. I'm trying to send a string variable as the body, but mailx is adding it as an attachment 'ATT00001.bin'. Here's a snip of my script: RESULT='' ...
1
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1answer
5 views

Phishing/Spam using old MX record for direct sending which is circumventing Mimecast

We've been using Mimecast for email security for a few months now and there's been a dozen or so incidents where the phish/spam senders have utilized the old MX records to send directly to our Office ...
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0answers
51 views

SMTP recipient's server gives 5.0.0 Service unavailable for some messages but not for others [missing SRS?]

I run a CentOS 7 sendmail SMTP server. For some addresses (a@myclient.com), a virtusertable entry causes my server to forward messages addressed to that address to the client's ISP (charter.net) or ...
0
votes
1answer
48 views

How to configure postfix/dovecot setup to reject certain mail for certain users/accounts

I'd like to be able to reject email from certain users or if it contains certain strings or if the title matches something for certain users. I'm in a multidomain enviroment. Is this possible? ...
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votes
0answers
8 views

Apple Mail 'export mailbox' on deleted account is missing mailbox emails on import

We recently moved our email accounts to G Suite. The previous email account was conflicting with the new one in Apple Mail, and I wanted to remove it. I used 'export mailbox' and exported the old ...
0
votes
1answer
51 views

What else to check to find why emails are not delivered?

Our email messages are not delivered. We have done some debugging but have not found any issues. When we send an email using a simple test script PHPMailer reports success and the logs indicate the ...