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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Mail Server Memory buffer error

rom time to time, my Mail server stops sending any new mails, and i each time i find the blow error log, Jun 22 23:10:18 myserver saslauthd[3967]: DEBUG: auth_pam: pam_authenticate failed: Memory ...
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1answer
5 views

Postfix - ability to send mail from alias address?

I have a mail server with Postifx (and dovecot) setup, on which there is an alias address (say alias@example.com) which forwards mail to my main email (myname@gmail.com). This works fine, and all mail ...
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0answers
9 views

Sending an email to multiple recipients via a mail relay, while hiding the recipients

Our software sends emails using Exchange. Typically each email foes to multiple recipients and we just send one email with multiple "to" addresses. We're moving to an SMTP-based email relay, where we ...
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1answer
20 views

Is it possible to make me send an email by opening a malicious email? [on hold]

I know I don't have much info on this problem/question so I will delete if everyone downvotes or votes to close/delete. Is it possible for someone to make an email look like I sent it simply by me ...
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0answers
23 views

How to add allowed relay IPs for Windows SMTP using command line or script

I have a long list of IP addresses I need to add as allowed relays to the built-in SMTP service on a Windows Server. I know how to add allowed relays manually, but there is quite a long list so I'm ...
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1answer
18 views

Forward mails sent to own domain to another mail-adress for free

I've got a domain example.com and would like all incoming mails to all mail-adresses a@example.com, b@example.com etc. to be forwarded to my private e-mail-account for free (so no Google Apps). ...
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0answers
21 views

Required programs to run a custom email-server on Windows server 2012r2

I've been attempting to create my own mail server for a few weeks now, but my current setup of my own custom domain, Hmailserver, Outlook 2013, ISS 6.0 (SMTP), Mysql, and Squirrel Mail doesn't seem to ...
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1answer
25 views

Postfix dynamically set Relay Host [duplicate]

Does anyone know of a way to dynamically set the relay host when sending mail through Postfix? At what point does Postfix set the relay host? Is there some way that I can tell Postfix to use a relay ...
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1answer
36 views

Rename “MAILER-DAEMON@” from postfix/dovecot [closed]

Have some method of change MAILER-DAEMON@example.com to postmaster@example.com or at least mailer-daemon@example.com in Postfix/Dovecot? I sought some forms in the Postfix configuration, including ...
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0answers
14 views

IMAP Proxy for Windows

I have configured a set-up of Hmailserver and Horde Groupware Webmail Solution on my test server which runs Windows 7. Everything is up and running smoothly but I'm encountering two minor issues: In ...
2
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1answer
27 views

How to make Postfix skipping some recipient's hosts as unreachable?

I would be really happy to learn how to make Postfix to "remember" that certain host is unreachable at the moment, so it would be good if we didn't perform any new connection attempts to this host for ...
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1answer
27 views

Hmailserver and Outlook 2013 can send but not receive any emails in POP3 or IMAP

I'm having problems receiving any email from outlook. I can send email through smtp using comcast (my isp) without a problem, but I can't receive any email using either personal pop3 configured in ...
1
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1answer
17 views

Exim4 intercept all outgoing mail

I have a LAMP stack set up on a Debian 8 (jessie) machine. I'm trying to find a way of intercepting all outgoing mail sent by PHP (through sendmail) and instead of sending it out, deliver it to my ...
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1answer
32 views

Outbound SMTP email not being delivered, but still disappearing from the queue and pickup folder

After setting up my smtp server on a Windows 2012 server r2 on port 587. I tested the email functions by creating a text file labeled email with the following code inside: From:admin@mydomain.com ...
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0answers
26 views

Figuring out why prodigy.net DNSBL is flagging me? [duplicate]

For the last 10 days, I've been unable to send mail to sbcglobal.net addresses from brinckerhoff.org (192.81.130.145). The responses from the sbcglobal.net MX (which turns out to be a prodigy.net ...
5
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2answers
191 views

Is there a graceful way to pick up new changes in sendmail?

Is there a graceful way to have Sendmail reload/process configuration changes from sendmail.mc without completely restarting services and potentially impacting smtp delivery that's in progress at that ...
2
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1answer
44 views

is there any way for MS-TNEF headers to be added to email in transit or receipt?

My coworkers have been complaining about receiving email from a certain company without formatting. I see the formatting just fine. Digging in, the differences appear to be that I receive email that ...
1
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1answer
36 views

Postfix behind a relay to handle incoming and outgoing mail with /etc/aliases

I'm trying to setup postfix on a Linux machine (Debian 8 with Postfix 2.11). But I have some troubles getting /etc/aliases to work correctly. The setup is as follows: A MS Exchange server is the ...
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1answer
18 views

How to resolve “Domain shares an MX record (mx2.zoho.com) for a mail exchange which will not accept mail to the administrator”

I have found one of our domains on a spam list, http://rfc-clueless.org/. It states that: RFC2 is not a spam list. Each of our curated lists track compliance with specific requirements of RFCs ...
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1answer
48 views

Postfix setup for LAN only [closed]

I have Ubuntu on which I installed Postfix. Postfix packet is up and running. I'm trying to make a simple e-mail system to work between a few LAN computers. Basically, I need to have some outlook ...
1
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1answer
33 views

Mails not being received. status=deferred (lost connection with 127.0.0.1

I have a MiaB box with about 30 email boxes. This errror pops up in /var/log/mail.err but with no other information. WARNING! Error in process_request eval block: /usr/sbin/spampd: write error ...
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1answer
39 views

PTR Record setup with separate incoming and outgoing servers [duplicate]

The situation: Even though SPF, DKIM, and the entire mail formatting is optimized to score 10/10 on mail-tester, many outgoing mails are marked as spam in yahoo and outlook. The primary server sends ...
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1answer
28 views

Dovecot reports no SASL authentication mechanisms

On my way to setup a mail server with Postfix and Dovecot on Ubuntu, I can now send mails to other domains. However, I cannot receive from others. In the logs it reads Jun 14 09:34:35 ...
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2answers
90 views

Is setting up my own SMTP server to send email a waste of time with regards to deliverability?

I have a dedicated host serving a few domains I manage. I host my own email and IMAP server. The server is at buildoneforme.com with IP address 144.76.81.247. I think reverse DNS is working: $ host ...
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0answers
17 views

IP Blackliste with CBL for 'HELO' command? [closed]

My Setup: cPanel w/ Centos + CloudLinux 6 EXIM. suPHP. PHP 5.5. 'prevent 'nobody' user from sending..' enabled Other Enabled Settings: CSF firewall (SMTP tweak enabled), CXS, suPHP, mail header ...
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1answer
27 views

Outlook Autodiscover Protocol Updated? (or broken?)

I have set up email autodiscovery on a non-Exchange email server per [this technet article][1], and when testing with Outlook 2015, it does not work. Outlook hits the server multiple times, ...
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1answer
21 views

Email Autodiscovery Not Being Probed By Android

Android's default email client is supposed to probe the server for the domain of the user's email address per outlook autodiscovery. This bug seems to indicate that at least the first two steps of ...
1
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1answer
15 views

Mailman not integrating with postfix properly

I installed postfix on my local machine and able to send mails to local users i.e. shivams in my case which is username of the account. Also i am able to send mail outside of my machine for ex. ...
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0answers
24 views

Mailserver complains about reverse DNS lookup on my Gateway

I am presented a mail server setup, that is working well. There's only a small issue, which makes me think, there's something wrong in the DNS setup. It is a small setup with a Debian mail server ...
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0answers
61 views

Unable to send email via Postfix SMTP via Mac Mail App

I installed a SMTP server with Postfix as mail agent (on Ubuntu 12.04). Config is as follow: $ postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no ...
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0answers
45 views

Mail spam error while sending mails using Gmail id via Postfix hosted on Amazon EC2 server

This issue is related to using my own SMTP server to send email by any user mail id like some other mail APIs do e.g; Amazon SES, MailChimp. I am using Postfix as a mail server for my applications. I ...
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0answers
53 views

530 5.7.0 must starttls command first

I have installed postfix and davecot into my server. And I tried to test it to send email. But I got the error message: 530 5.7.0 Must issue a STARTTLS command first after telnet localhost smtp, ...
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1answer
20 views

postfix check user database to prevent forged address

Please check sample spam mail Hello: We are facing problem with our mail server. We have two server for mail system, one is pop only (Dovecot installed) and another one is SMTP (postfix, amavis, ...
0
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2answers
35 views

Send Email to Admin when Message size limit exceeded

How to trigger an email to admin, when someone tried to send an email exceeding the message size limit? I couldn't find any such configuration to tweak. Note : I use exim MTA
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1answer
21 views

host -t MX pro.lan -> pro.lan has no MX record

Setting up some service on my server. DNS/DHCP/Gateway ok for my own local network. Planning to host a web mail server (working on local for users for now) I added in my dns A and MX record (rDNS ...
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1answer
46 views

rDNS and forward DNS for mail server behind firewall, different IPs

All, Here is my setup : Firewall(x.x.x.114) <--> mail.mailserver.com (FQDN) (x.x.x.118) When sending mail, header has following IP ...."Receivedfrom mail.mailserver.com ([x.x.x.114])", my ...
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1answer
14 views

Do spam impersonators impact my server's reputation?

Recently I opened my server's webmaster email inbox and found 32 "Delivery status notification failed" emails reporting the failure of the delivery of 32 emails I did not send. After some ...
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1answer
41 views

Unable to resolve IP Blacklisting with Spamhaus

I have a website which is currently assigned an IP 64.XXX etc from my hosting provider. This IP when looked up comes up clean with all Blacklist checks that I run. However, I am also being assigned an ...
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0answers
21 views

Scalix - Finding out when a mailbox received its last email

I have an old email-server that I want to shutdown. To do that I want to know when each mailbox on that email-server has received its last email. Sadly i don't know much about Scalix, just a few ...
0
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1answer
42 views

Using PTR on SPF Record and Multiple Domain Pointing Single Server

Today I've checked my SPF is valid on some of the sites and invalid on some of the sites I've tested. Microsoft also couldn't see my SPF record for some reason while others can. (Sender ID ...
0
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2answers
538 views

Relay access denied (in reply to RCPT TO command) Postfix Issue

I am trying to configure my server for email taking reference form this link: SMTP Relaying Outgoing Mail in Postfix - using Webmin. I used Mandrill smtp server in my case. I have also configured a ...
2
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1answer
45 views

Android email auto setup

There are some questions on serverfault about setting up Thunderbird autoconfiguration and Outlook autodiscovery, but when using the default email client on Android (tested on three phones - v4.4 and ...
0
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1answer
57 views

Some mail providers reject my mails

I recently moved to a new server and now one of my users complain about e-mails which don't reach the recipient. The mail logs tell me that they reject the mail AOL will not accept delivery of this ...
2
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1answer
73 views

Does postfix cache RBL queries?

This is driving me nuts… Linux Debian + postfix… /etc/postfix/main.cf has the following lines: smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/access, ...
2
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1answer
21 views

How are display names determined for mail that comes from outside Exchange?

I've found lots of articles explaining how Exchange gets display names out of LDAP, etc., but not a lot about what it does when mail isn't coming from within the Exchange environment. When we've sent ...
0
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1answer
253 views

Reverse DNS does not contain the hostname error from MXToolBox

I am not sure where I have gone wrong in my configuration but I am getting the error Reverse DNS does not contain the hostname for my domain sparkdojo.com I had the hosting company set the PTR record ...
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1answer
70 views

Can't setup mail externally zimbra 8.6

I just setup zimbra 8.6 on ununtu 14 and have only one issue I cannot setup mail externally Here is mystery Server host name is tin-exc-1.tingateitsolutions.com.au Domain is ...
4
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1answer
173 views

Can a backup mx server be configured to reject email submissions if it can connect to the primary mx?

I know that one technique spammers may use is to send spam to a secondary mail server, since those servers tend to be less powerful and may not have all the spam filtering that the primary has. Can I ...
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1answer
132 views

Minimal setting of Exim from Debian 8.0 “Jessie” to work out-of-the-box for receiving mail

I am looking for a simple advice what should be essentially (minimally) done to make a default Debian 8 Jessie's exim4-daemon-heavy installation to actually receive any mail. Speaking of essential ...
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1answer
30 views

osTicket emails show as sent from wrong address

I'm currently trying to configure osTicket to act as our support system. Everything seems to be working pretty much as expected. However when an email sent by the system is received, instead of ...