Tagged Questions

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

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11
votes
2answers
316 views

Is it still “wrong” to require STARTTLS on incoming SMTP messages

According to the STARTTLS Spec Section 5: A publicly-referenced SMTP server MUST NOT require use of the STARTTLS extension in order to deliver mail locally. This rule prevents the STARTTLS ...
-2
votes
1answer
24 views

spam email forwarding by server [closed]

Let's start with this scenario: We have a mailbox (i.e. in yahoo), every message is sent by this account, marked as spam by Gmail spam filter. (because the address or sender IP is blacklisted, ...
1
vote
0answers
48 views

Preemptively prevent down time and email issues

First of all, I apologize if this questions seems too generic. I searched this site and a few others and really did not get the answers I was looking for. Since migrating to a new virtual ...
1
vote
1answer
80 views

Restore Zimbra Mail Server from Server that crashed

I had a Zimbra installation which crashed due to Hard drive failure. The Zimbra was version 5. My backup was not good and so I did a fresh install and now I have managed to get the /opt/zimbra folder ...
2
votes
1answer
81 views

Does postfix reject spoofed senders?

Is there a reliable way to reject incoming mails with a spoofed e-mail address? What kind of checks does postfix run normally on incoming mails? does postfix check the reverse dns by default? does ...
0
votes
0answers
108 views

Sendmail Failing to Forward Locally Addressed Mail to Exchange Server

When a customer places an order via our (Magento CE 1.8.1.0) website, a copy of said order is supposed to be BCC'd to our sales manager. I say supposed because this was a working feature before the ...
-2
votes
1answer
73 views

Crontab not working to send email [closed]

I have CentOs 6.5 running on a VPS Host. I installed crontab and email using the below commands yum install vixie-cron service start crond chkconfig crond --levels 235 on yum install sendmail ...
0
votes
1answer
197 views

defer (111): Connection refused when trying to send mail

I am getting desperate for answers. The problem is simple, some email messages are getting stuck in our queue and hitting their retry limits, which ultimately end up in a never end deliverable bounce ...
-5
votes
1answer
141 views

Mail remove by postfix Centos 6.5 [closed]

I use Postfix for sending local mails over another relay (gmx). But the gmx-Servers block my Mails with 550-Requested action not taken: mailbox unavailable 550 invalid DNS A/AAAA resource record. What ...
0
votes
1answer
76 views

Issue with receiving emails via Dovecot/Postfix

I'm trying to set up roundcube on my server which seems to be working fine. I have gone through all of the steps and it allows me to send outgoing emails perfectly fine (tested that with yahoo), ...
0
votes
1answer
95 views

Problems saving encrypted emails from Outlook into Document Management System

We use a commercially available Document Management System (DMS) which integrates with Microsoft Outlook 2010. This allows users to save important emails in the DMS so that their colleagues have ...
0
votes
0answers
31 views

DKIM errors in an nontransparent system

We have a client who has their mail hosted using a local exchange and POP3 connector's to their head office, and we only have access up to the POP3 connectors. This client hasn't been receiving all ...
1
vote
1answer
157 views

cannot connect to postfix with a mail client

I have been trying to setup MX in my server and was able to get the IMAP part working under SSL using Dovecot, however I can't get the SMTP part working using Dovecot as the SASL Authentication. When ...
1
vote
1answer
70 views

What happens inbetween SMTP and POP3?

I understand SMTP, and to a lesser degree POP3, but I feel like I'm missing a large chunk inbetween. I see this image on a Microsoft page: and I feel like what I'm missing is the "Internet" part. ...
-3
votes
1answer
23 views

RDBMS mailbox store for MDA/LDA [closed]

I am looking for a RDBMS mailbox store solution, as an alternative to "mbox", "maildir", etc., used by Procmail, Dovecot LDA, etc.
0
votes
0answers
25 views

Crond stopped sending e-mails for no apparent reason [duplicate]

I have a cron job that I want to run just once a day (executes a rake task), but while I'm testing it I have it set to run every 5 minutes. It was running perfectly fine this morning and sending me ...
1
vote
1answer
35 views

Using Google Business Email simultaneously with other mail server for one domain

My partner is having some problems with delivering and receiving emails. They asked me to check Google Business Email, if it can provide a solution. My question is: Is it possible to split users into ...
0
votes
1answer
74 views

Postfix acting as spam server. Looks like it's part of a botnet, spam messages being sent to customers [duplicate]

Let me first start out by saying I am no mail guru. If you need more info to help me just let me know. This week the mail server has been having all sorts of strange issues. It has been duplicating ...
1
vote
2answers
41 views

Restrict certain hosted sites from sending mail on Ubuntu LAMP server

I host several live sites, and several staging sites on one server that's running Ubuntu 14.04. Most of the sites are wordpress sites, and are using the php mail() function or the PHPMailer class to ...
3
votes
1answer
194 views

Turn off password expiration after user changes password (Linux)

One of my e-mail servers uses unix system accounts for user login. Because I didn't set up any complex password policies (our users, including management staff, don't like complicated passwords), one ...
-3
votes
1answer
60 views

Rainloop: arbitrary sender address? [closed]

I just set up my mailserver (Postfix as SMTP and Dovecot for IMAP) and as web frontend I use Rainloop - which also works very well! My setup is that I have only very few real users (actualy at the ...
0
votes
1answer
76 views

SPF failure with gmail

I'm trying to properly set up DKIM, SPF, and DMARC so emails sent from my server are less likely to be seen as spam. I got my first DMARC report and I'm little confused by this part: ...
-1
votes
0answers
25 views

DSPAM not being called on some emails with Postfix

I have Postfix/DSPAM set up, and it works properly almost all of the time. Most messages have DSPAM headers. However, every day it seems like a little bit of spam gets through without DSPAM headers, ...
1
vote
1answer
30 views

How to forward specific local addresses using .forward file

I have an account that recieves email using multiple addresses. I want to redirect some addresses to a different mailbox using the .forward file in my home directory, based on the local part. So say I ...
0
votes
1answer
194 views

Using SMTP Relay on a Exim Server in VPS for Multiple Domains

I am moving my email behind a dynamic IP, and I will need to SMTP relay outbound email in order to avoid spam lists. My domain is hosted through a BlueHost VPS running EXIM. I am wondering what I ...
0
votes
2answers
77 views

Mapi or Imap for small company with slow internet connection and outlook

I am helping a small company that currently have an external hosted MAPI solution in Outlook 2010-2013. It runs on 6-7 computers and for all users their outlook takes between 15-60 seconds to start, ...
-2
votes
1answer
37 views

Limit Emails Per Hour Per IP [closed]

Anyone knows a script or software for CentOS and Windows that can be installed onto dedicated servers with no control panel limiting emails per hour per IP or full block. Thanks in advanced!
-2
votes
1answer
44 views

How do I recieve incoming mail on an email address in Linux [closed]

Background: My department does a lot of communication using email to ask and answer questions. We have an internal StackOverflow type board set up but it's a headache for them to log in to the VPN and ...
-1
votes
1answer
121 views

Postfix sends as hostname.domain.com instead of domain.com

I've been trying to set up a debian mail server running postfix, but when I try to send mail via mail example@outlook.com the recipient sees the sender as hostname.domain.com. The hostname it sends ...
1
vote
1answer
39 views

imapsync some mails are not transferred

Im using this code: imapsync --buffersize 8192000 --nosyncacls --subscribe --syncinternaldate --noauthmd5 --host1 old.server --user1 old.user --password1 123456 --host2 localhost --user2 ...
0
votes
1answer
77 views

Ubuntu 14.04 Postfix Access denied

Sorry to write here I'm really using it as a last resort. I have recently got my hands on a dedicated server. I'm not good with linux (not at all), but I wanted to set up a full server (Web, mail, ...
3
votes
1answer
53 views

Configuring dynamic e-mail aliases such as “user+keyword”

My Ubuntu server is using Exim4/Courier for emails and I'd like to know if it's possible to create dynamic email aliases for receiving emails like this: client+client1name@domain.com ...
2
votes
1answer
33 views

Send mail with priority from console

How can I send mail from the console marked with "priority high" flag? Currently I'm using this syntax: echo "message content" | mail -s "subject" user@example.com I don't see any switches for ...
-3
votes
1answer
64 views

my crontab doesn't send mails anymore

Before saturday, mailing after crontab executions were working but from now on, it doesn't work at all, but the config didn't changed. Operating system : Debian 7.5 I tried using PHP the mail ...
0
votes
2answers
44 views

Receiving mail in a python process on an aws instance

I'm using a Python smptd server on an AWS instance. It's listening on localhost, port 25. I can send mail to it through a Python smtp client on the same instance. I have an elastic IP associated with ...
0
votes
1answer
44 views

“relay access denied” after changing domain A record

I'm experiencing issues with email, specificially "Relay Access Denied" errors after changing my A record for my apps domain name. It was previously setup like: Host a manages dns (mydomain.com in ...
-4
votes
1answer
62 views

How does an MX relay work, as in, how is my SMTP server supposed to use it? [closed]

I'm trying to set up a Postfix server (any other software would be ok for me as well). I don't have a static IP, and that can apparently be quite a problem for e-mail purposes: I managed to "send" ...
-1
votes
1answer
37 views

At what point should I dedicate a server for SMTP [closed]

I currently have a 2GB RAM windows server 2012 which is has IIS and SMTP installed on there. Now I seen alot of people leave SMTP out on the webserver and buy a server just dedicated to handle the ...
0
votes
1answer
91 views

How to setup Postfix with Opendkim to automatically sign PHP emails?

I've found that: submitted emails are signed properly (ie those sent with MUA's like Outlook and Thunderbird) command-line sent emails are signed properly emails sent with PHP, in particular case ...
0
votes
1answer
22 views

SpamAssassin doesn't filter forwarded mails

I am forwarding emails from an external email account to an account on my own server. SpamAssassin works fine if I just receive mail normally. But all mail thats being forwarded from my external mail ...
0
votes
1answer
44 views

What could have changed email headers?

I'm sending email programmatically with the following headers: From: rm-noreply@mycompany.com Reply-To: rm-noreply@mycompany.com However, recipients sees them differently From: "Some Name" ...
0
votes
1answer
58 views

Remove X-SA-Exim Headers from out going emails

I am using EXIM4 on Ubuntu 12.04 with Spamassassin for sending emails. Any emails will be relayed through Amazon SES service. But I want to hide the bellow headers in outgoing emails. ...
-1
votes
1answer
172 views

Postfix insists use port 25

I have a VPS server LAMP and all it works normaly. But when I try send a email to external server (outlook.com), this error occurs (visible on postfix log): Jul 23 18:15:00 serv postfix/smtp[1792]: ...
-1
votes
1answer
131 views

Unexpected failure, please try later (in reply to end of DATA command)

while trying to send emails to the following address some_user@f-gs.jazztel.es i always get the following error message. Could any one tell where can i look in order to find what's going wrong? This ...
0
votes
1answer
270 views

exim4 - Why is rate limiting outbound mail to a smarthost only working with acl_not_smtp?

In an effort to rate limit outgoing emails per recipient (all emails are sent by the same user), I've been doing some testing in a very simple environment: ...
0
votes
0answers
35 views

Incoming / Outgoing only working with mail

I have setup my domains nameservers to cloudflare (has been for a while so that side is all resolved) and the records as follows: Type Name Value A highwaysindustry.com ...
1
vote
1answer
47 views

S/MIME: signed mails with disclaimer from mail filter/mailscanner?

We have a Mailscanner, which scans incoming and outgoing mails and add a small disclaimer (Mail was checked for Viruses... bla bla bla). So far i can add a disclaimer without signing the mail, or ...
4
votes
1answer
184 views

How to trigger custom actions in dovecot, when email is moved or deleted?

In my dovecot setup I use virtual folders (not to be confused with virtual users). My goal is to get something like seen in googlemail. I want a folder containing all my messages and also I want to ...
0
votes
0answers
58 views

hotmail isn't receiving mail from my server

Hotmail is block all mails (not send to Junk, it really block!) send from my VPS server (even if I send directly from roundcube, for instance). I checked all configs and seems that all is ok. Works to ...
0
votes
1answer
39 views

Dovecot login with username and no @domain.com extension

I have dovecot setup and working, but i can only login as a linux user without the @domain.com extension. e.g joe.bloggs is a user on the linux system. i can login using this as the imap username and ...