SMTP is a protocol built upon TCP/IP, used for outgoing email transmissions, and email relaying. It uses ports 25 (clear) and 465 (SSL) by default.

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mailx: nss-config-dir=/etc/pki/nssdb/: No such file or directory

I am trying to send email using mailx using remote SMTP server (in my case it is office365 SMTP Server). Here is the command: # echo "THis is the Body of the email" | mailx -v -s "This is email ...
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Postfix using external smtp server problem

I am not sure if this is the right stack exchange for my question, there are multiple stack exchange were my question might fit. I have setup my postfix configuration to send my emails through an ...
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1answer
678 views

Emails not sending to one specific domain

We have a AWS server where emails are delivered to domains other than our own domain. I have confirm that I can send an email to my gmail account but I can't send to my hosted gmail account. So for ...
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1answer
15 views

Does SSMTP cause spam issues?

I am currently using SSMTP to send email notifications from my Icinga server. I am using my web host's STMP server to send the mail, with working authentication details [ eg icinga@domain.com ] When ...
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I use OpenSMTPD on OpenBSD 5.8! How can I automatically encrypt E-mail with OpenSMTPD

How can I automatically encrypt all outgoing E mail? My scenario: I use XXXX@gmail.com as my relay for all Emails my OpenSMTPD Server forwards All Emails to me as well as all Emails from somewhere to ...
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setting up a relay port for postfix smtp on CentOS 7

A CentOS 7 server has postfix, dovecot, and mailx installed. I am able to make an IMAP connection to the server from my remote Thunderbird client running on my local devbox. But I am not able to ...
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SMTP connectivity issue in Zenoss (“Connection unexpectedly closed”)

I am using Zenoss for monitoring purpose. I have been using its mail service for a long time. Suddenly my mail service in zenoss stopped and started showing <class ...
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2answers
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SMTP issues - unable to connect : CentOS 6.5, Postfix, Dovecot, MySQL

I'm trying to setup an email server on a CentOS system with Postfix, Dovecot and MySQL. I'm following this article for an Ubuntu system: ...
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45 views

Why are my emails generated with Python stuck in mail queue

I'm trying to send emails programmatically with Python. The emails stay in the mail queue (mailq). Details are below. My diagnosing abilities have reached their limit. Perhaps the issue is my ISP ...
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52 views

gpg: passwordless decryption works in terminal, but not in tmux based msmtp/mutt (can't open /dev/tty)

first try: (with --no-tty in my msmtp config) (reboot) head -n 1 ~/.gnupg/gpg.conf use-agent gpg agent is started: % systemctl --user status gpg-agent.service gpg-agent.service - GnuPG private ...
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3answers
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Mutt not sending email when specifying smtp server

I am trying to use mutt as my email client, and it works fine for my gmail account. But when I use my work email, it does not send the emails. It doesn't give any error, it just doesn't send them. The ...
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31 views

How to enable secure authentication (ssl,tls,starttls) in nullmailer 1.0.5. and upgrade nullmailer to 1.11

I am using a linux based device where we use nullmailer to send email using smtp. nullmailer version: 1.0.5 User-Agent: Mutt/1.5.19 (2009-01-05) In the existing mechanism, our smtp server does not ...
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1answer
87 views

Trying to send multiple text attachments via mail message

Running this script on: "Red Had Enterprise Linux Server release 5.11 (Tikanga)" Mail is: version 8.1 6/6/93 (appears quite old). Have tried various things and cannot seem to get this to work.. ...
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1answer
74 views

invalid SSL_version specified at /usr/share/perl5/IO/Socket/SSL.pm line 368

SMTP SEND CRITICAL - invalid SSL_version specified at /usr/share/perl5/IO/Socket/SSL.pm line 368 I am using a nagios script /usr/lib/nagios/plugins/check_smtp_send that sends an email using gmail. ...
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55 views

Configure stunnel for smtp imaps of Gmail

hope someone could help me, i'm trying to configure stunnel on Debian system for get access to my gmail account. I have read a lot and it's seem simple but i can't figure it out. I have install and ...
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1answer
24 views

Is this the correct SPF DNS TXT syntax to allow the existing email servers (DNS MX records) and to authorize the new smtp server ip-address?

v=spf1 +mx ip4:65.1.2.3 -all Domain DNS TXT records to change: product1.com : sales@product1.com otherproduct.biz : sales@otherproduct.biz Information: Both domains have DNS MX records, and ...
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1answer
45 views

What is the correct helo for a smtp server that does not receive mail and does not have a FQDN?

What is the legal and correct helo for my SMTP server. Out going email only. Behind a NAT with no inbound ports open. SMTP server does not have a FQDN. Send mail for 2 different domains We are a ...
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Dovecot… shadow - uknown user… how do I fix this

For one user in particular I have this maillog error and the user is unable to send files using SMTP WLMX002 dovecot[1402]: auth-worker(49961): shadow(user@domain.com,X.X.X.X): unknown user How do ...
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2answers
47 views

Fetchmail with local Postfix on Home-Server

a small question... I have a fully configured postfix server which have a few domains, few users, and much more. Then I have a smart host which receives all mails and send all mails. For example ...
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2answers
48 views

Can I send email in the background in Mutt while still being notified of errors?

Removing mutt's send delay I originally used mutt's built-in SMTP MTA. However, there is a considerable pause after hitting send. This can be disabled by using an external MTA with set ...
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1answer
67 views

sendmail smtp auth simple,why fail auth?

On sendmail i did this for smtp auth sasl is running root 1609 1 0 05:16 ? 00:00:00 /usr/sbin/saslauthd -a pam -c -m /var/run/saslauthd -n 5 root 1610 1609 0 05:16 ? ...
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2answers
579 views

Exim4 550-Verification failed - how to allow any sender?

Mail sent from a daemon on my server connecting to exim4 daemon light using SMTP seems to be being frozen. In the exim4 log: 2014-10-01 09:52:19 1XZKKJ-00049R-8p <= noreply@example.com H=localhost ...
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66 views

How can I safely send email over encrypted connection from the command line?

I found the following related questions on the stackexchange network: stackoverflow - Connecting to smtp.gmail.com via command line serverfault - Using nc.exe (NetCat) to send emails to secured SMTP ...
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1answer
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Postfix: disable authentication through port 25

When using Postfix and IMAP on a mailserver, at least 3 ports are usually opened 25 smtp : incoming emails from anybody (whole internet) 465 smtps : outgoing emails from authorized users (to the ...
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3answers
190 views

postfix filter incoming mails based on 'mail from' and 'rcpt to'

I want to reject emails to my postfix server based on more than one criteria, specifically I want to block emails from Russian email addresses (or that contain Cyrillic characters, but this I suspect ...
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1answer
76 views

Postfix does not work with TLS but Dovecot does

I have posted this question on Sever Fault but as soon as I mentioned that I have a control panel installed on my server (even though it has nothing to do with the issue) my question was closed. Here ...
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2answers
53 views

Where to configure my smtp server in Mutt utility

I have my smtp server -- smtp.drdb.com which is registered in DNS. I need to setup Mutt utility in my RHEL 6 server. Where should I input my smtp server details in mutt.rc file so that I can send ...
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2answers
5k views

Why I can't send mail to remote mailbox?

I have installed Postfix on my CentOS machine. I can nicely send mails to local accounts with mutt, but when I try to send one to a remote mail like myactualmail@gmail.com, I cannot understand why I ...
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1answer
105 views

Sendmail issues “530 Authentication required” error message when authinfo is supplied

sender_email - email address that does not exist, but must be used as FROM address, because receiver host rejects emails from other emails. receiver_email - email that is supposed to receive the sent ...
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46 views

Cannot make sendmail to use a remote SMTP server [closed]

I followed the following guide on how to setup sendmail to use a remote SMTP server and authenticate: https://www.smtp2go.com/docs/sendmail/ However, sendmail shows that it sends emails out, but ...
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45 views

Postfix Email Troubleshooting

I'm having some trouble changing the server I use for Postfix emails. I've installed postfix on the Linux server (CentOS 5) and setup as follows. I added the settings to the /etc/postfix/main.cf ...
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1answer
1k views

Exim4 as smarthost with SSL?

I want to use exim4 as a smarthost to send email using an smtp mail account over ssl. I've seen the hosts_require_tls option, but I need SSL and not TLS. How should I do this?
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Using port 587 with sendmail

I have been using sendmail to send out mails using internally available mail server. But currently port 25 is blocked for security reasons. I would like to know if there is a way to specify port ...
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How to force use SMTP servers in Alpine?

Does anybody know how to force Alpine to use a particular SMTP server from the config list? It seems to choose the first server in the SMTP list in config, but I want to be able to choose the SMTP ...
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1answer
97 views

Linux SMTP Server For Java Application

We currently have an e-mail processing application written in Java running on a Windows server that we are looking to migrate to a Linux server. The current Windows server has the IIS SMTP service ...
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5answers
92k views

Can I set up system mail to use an external SMTP server?

Is it possible to set up system mail on a linux box to be sent via a different smtp server - maybe even with authentication? If so, how do I do this? If that's unclear, let give an example. If I'm at ...
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90 views

Iptables - Limit SMTP output traffic

I'd like to limit the output smtp traffic of my server (Debian). For example : only 10 mails per seconds. I want to use Iptables for this purpose. I tried : iptables -A OUTPUT -p tcp --syn --dport ...
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1answer
618 views

Why use user@privatedomain@smtp.gmail.com in Mutt configuration file?

I cannot authenticate to my university smtps server with Mutt, with the same error message as http://askubuntu.com/questions/81924/sasl-authentication-failed-with-mutt-and-gmail-why/ ...
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4answers
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Helo command rejected: need fully-qualified hostname Error

My mail server is in some blacklist cause of spams. I reconfugured postfix. Aften then My customers get this error they can't send emails. 404 4.5.2 <PLLAMNAZIFE>: Helo command rejected: need ...
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1answer
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How to configure sendmail.postfix to relay on exchange 2010?

I'm currently trying to figure out how to configure sendmail.postfix in Red Hat 6 to work with exchange 2010 relay. I've already configured our exchange server to allow our web server to relay. What ...
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2answers
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IPTABLES to allow ssh, ftp, pop, etc from one static IP address with HTTP/SSL open to public

This is my setting in /etc/sysconfig/iptables: #start of my iptables # Generated by iptables-save v1.2.11 on Wed May 27 00:31:22 2015 *mangle :PREROUTING ACCEPT [130933577:29488298585] :INPUT ...
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682 views

Postfix with smtp authentication failing

I'm currently in the process of updating my new server to do the same tasks as my original older server (new server is running Debian wheezy, old server is running Debian squeeze). The issue I'm ...
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1answer
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Centos - Sendmail smtp smarthost with authentication

I would like to setup sendmail to send out mail using an external smtp-server with authentication. I've searched for solutions, but can't seem to find what I need. There are several examples about ...
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1answer
112 views

how to prevent cron job email splitting into multiple lines

CRON has emailed me the extract below : May 12 04:27:54 rpi postfix/smtpd[9343]: NOQUEUE: reject: RCPT from unknown[95.211.213.214]: 504 5.5.2 <WIN-HBAL58UG0JH>: Helo command rejected: need ...
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101 views

Centos 6 and postfix: Internal emails deferred / telnet timed out from SSH

The problem is, that I have a VPS with centOS 6 installed, and I can send emails to anyone, but my own exchange server, Apr 29 11:50:30 amazonnet postfix/smtp[16535]: 2B6FF3CC49A: to=, ...
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1answer
64 views

Local E-Mail sink

I do have multiple mail accounts (personal, university, work, …). Currently I'm connecting from every device (notebook, smart phone, tablet,…) to each of them via IMAP . Setting up multiple IMAP and ...
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159 views

Dbmail / Postfix Send mail to local adress

I have a FreeBSD Server with Postfix and DBmail. The mail system is working perfectly except for one thing: I cannnot send an email from domain1.com to domain2.com if they are both hosted on the same ...
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1answer
119 views

Postfix / Dovecot Mail appears in logs, but not in its respective folder

I'm currently trying to set up Postfix with Dovecot, but something does not seem to work the way it should be. For some reason, mails I sent to my mail account appear in the logs, but do not become ...
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121 views

FreeBSD Reinstall postfix with mysql support

I have installed postfix using the ports tree without making modifications to anything. In my main.cf file i can't specify any 'Mysql:/' arguments because postfix does not have mysql support. Now i ...
2
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1answer
454 views

assigning two ports to one service in firewalld

Is there a way to assign two ports to the same service in firewalld? For example, I would like for the SMTP service to listen on both port 25 and port 465. My first instinct is to change ...