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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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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How can I use CNAME in Bind properly?

I'm new to Bind/DNS and want to point/map SMTP, webmail and IMAP to my domain but a check in nslookup is failing. How can I nslookup SMTP this way? The error I get is: smtp.stylez24.com: NXDOMAIN ...
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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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1answer
28 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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1answer
742 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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64 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
24 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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2answers
3k views

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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1answer
25 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 ...
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1answer
382 views

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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1answer
49 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 ...
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1answer
62 views

exim4 on debian 7.8 sent mail never arrives @gmail

I followed the instruction on this page Debian Exim and configured my exim with a single file via the dpkg-reconfigure exim4-config setup. Now I can send mails between local users (from root to ...
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1answer
40 views

postfix logs: SMTP sessions stopping after RCPT TO

I took a look at my postfix logs and I've noticed an odd occurrence lately: SMTP sessions that seem to end right after the RCPT TO, as such: postfix/smtpd[11333]: > unknown[XXX.XXX.238.86]: 220 ...
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0answers
32 views

DBmail / Postfix : Relay Acces Denied

I am currently setting up a FreeBSD mail server with DBmail and Postfix. When i try to send an email from Hotmail.com to my server is gives this error: Feb 28 10:53:31 keroth postfix/smtpd[1848]: ...
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1answer
55 views

Relay access denied when using SMTP to external recipients POSTFIX FREEBSD

i am trying to send an email with my freebsd server using postfix and dbmail to an external adress. I have noticed the following things: MYSERVER -> MYSERVER = OKAY EXTERNALSERVER -> MYSERVER = ...
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22 views

Where can I find either a)my SMTP log and / or b)determine/toggle whether or not SMTP is being logged at all

My server sends out emails via sendmail or SMTP, depending on the situation. I am trying to find logs for SMTP. Sources indicate that I should look at /var/log/maillog ...
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1answer
29 views

FreeBSD dbmail , postfix port 110 error (220)

I am currently setting up a FreeBSD mail server with DBMAIL and Postfix. I have forwarded port 25,110 and 587 to this server. When I try to log in using pop3 on port 110 my mail program does not find ...
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2answers
26 views

Mail is not going in some domain

We are using Phpmailr function to sending mail after registration . When we are using gmail,hotmail mail ID for registration mail is going perfectly. But when we are using AOL or some other domain ...
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6answers
23k views

Lightweight outgoing SMTP server

What do you use as a lightweight SMTP for outgoing e-mails only? I am running an app that sends e-mails via SMTP when events occur once in a while, and I don't need a fully featured e-mail server. ...
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4answers
10k views

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
78 views

how to find out the full path of the command from the result of lsof -i

lsof is a great utility, just now started using it. lsof -i | grep smtp => this give the following result. httpd.pl 212548 global 3u IPv4 893092369 0t0 TCP ...
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1answer
64 views

IMAP Dovecot cannot connect

I am trying to set up my own mail server (for 'fun'). I followed this tutorial to the bone. But I get this error message: imap-login: Disconnected (auth failed, 2 attempts in 9 secs): ...
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0answers
41 views

how to setup smtp server in Intranet sub-domain?

I would like to setup an SMTP server in a Linux system to be used by an application to send emails to users and process their replies. Our organisation uses MS Exchange and they don't want to setup ...
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42 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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39 views

my domain server instead of localhost

I was using localhostin my script for sendmail. Now I am not allowed to use that. I have got a domain hosted at the same hosting company. How do I rewrite the portion of the script ...
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1answer
84 views

Can I view my Microsoft Exchange Online Archive via Davmail in Thunderbird

I have successfully set up Davmail on Ubuntu 14 and am able to read, receive and send mail on my Exchange account in Thunderbird. This page was a big help!: ...
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1answer
51 views

exim + courier + squirrelmail mail delivery in wrong directories

I just installed an E-Mailserver using exim for SMTP, courier(-imap) for fetching mails via IMAPv4 and squirrelmail as web client for the end user. Everything works fine. But when I sent an E-Mail to ...
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2answers
226 views

postfix multidomain myhostname configuration

I have two IP address running on Postfix and each IP has own domain. In short i want to isolate domain so outside folks think it is running on own IP and fully isolated even PTR also But in postfix ...
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1answer
865 views

Postfix error: not yet authorized to deliver mail

I am running a private postfix server for my domain mydomain.com, on server 111.111.111.111 (IP and domain sanitized for privacy reasons) I have sent an email to info@example.com which is on server ...
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1answer
52 views

can i get imap access using just postfix and mailx?

I have postfix and mailx installed on a CentOS 7 server. I am able to send and receive email from the command line using the mailx command. I am also able to read email in each user's inbox using ...
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3answers
378 views

unable to view postfix email from centos 7 command line, why not?

I have postfix installed on a development box and I used the parameters from this other posting to configure postfix to work on localhost only. But the other posting does not explain how to send ...
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1answer
145 views

Relay access error when I try to send mail from outside to postfix

I run a debian 7 system and I run postfix as smtp server. I can send mail from postfix to outside (even though it gets to spam folders by google) but when I try to send a mail from, lets say my google ...
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0answers
89 views

Postfix multi IP/Domain SMTP Helo'ing

We have Postfix running with two domain and each domain has own IP so it's isolated. But Spamhuaus blocked my IP and saying you are sending "localhost.localdomain" HELO I am already using ...
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1answer
44 views

how to set up my mail

I'm just trying to figure out how to use the mail command from the command shell. I've got Ubuntu 12.04 on my laptop. I've been entering the following: user@hostname:~$ mail ...
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0answers
54 views

Postfix - send email from catch-all adress

I have a domain with a catch-all address. Let's say every mail with @example.com as destination-domain will be routed to my primary address. That is working fine with postfix and virtual addresses. ...
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1answer
46 views

Alpine: work with some e-mails

How can I setup alpine to use more than one mail address? That SMTP Server parameter in config looks like an global. Can someone help me? NOTE: At least for both e-mails on the same server. Thanks.
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2answers
6k views

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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1answer
113 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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0answers
68 views

SMTP works via Mail client but not via openssl

I'm trying to troubleshoot an SMTP issue. My credentials work fine via the OS X Mail client (and in other areas), so the credentials are definitely good. However, when I try to submit them via: ...
2
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2answers
62 views

Sending mail to lan ip failed

In a Ubuntu os, with sendmail installed (maybe as default installed package) but not configured, I tried to type both echo "Text message" | mail <dest_ip_address>\!dest_user and echo "Text ...
2
votes
2answers
1k views

setting up mail system

So I'm still kind of new to linux, but what are the steps towards setting a linux box up in such a way that it can send mail using shell? echo "hello world" | mail johnny@moo.com I mean, I've done ...
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1answer
81 views

Is it safe to remove “received” header?

Is it safe to remove "received" fields created by my mail server for all outgoing mail? For example like this (all "received" headers from my server are deleted by postfix "smtp_header"checks"): ...
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1answer
130 views

mail command successful, but mail was not received by recipient

I used mail, its exit status is zero but the recepient is not receiving any mail. What could be the problem? I used this code: mylinsystem:/etc/mail # mail -v -s "test" ...
2
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2answers
189 views

outgoing SMTP 25 port blocked by ISP?

I just setup postfix but I just realized my ISP outgoing blocks port 25 (SMTP). How do I send email outside? I can see my mail queue is filling up. Any suggestion?
3
votes
1answer
279 views

Reverse DNS does not match SMTP Banner for multidomain hosting

We are planing for mail hosting, we are going to host multiple customer mail domain on single public IP. Now how i am going to set PTR record per customer? because i have single IP and it has to be ...
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0answers
12 views

Postfix: Map display name with smtp_generic_maps [duplicate]

I have a server where I have postfix configured to relay all mails to a smart host. Even mails sent from local accounts to local accounts. Furthermore all mails sent to local accounts are mapped to a ...
2
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2answers
298 views

Alpine using localhost address

I'm having a hard time figuring out what's going on with my setup, first there's no problem with the imap part as I can see my email, but when I try to send a message I get this error: [Mail not ...
2
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1answer
69 views

How to configure SMTP with postfix with user and pass

I'm looking for a way to enable postfix (or any other mail delivery system) in which I can easily have aliases (user and domain aliases), and in which I can have an external user send mails through ...
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0answers
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What is error code 68 for msmtp and which problems may provoke it?

Sometimes, when I send mails (from alot MUA making use of msmtp) I get the following error message: failed to send: msmtp --account=FOO -t failed with code 68: A process has ended with a ...
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0answers
135 views

Confirm DavMail connection

I am using DavMail to connect to my employers Outlook servers. Before I attempt to configure the email client to work with DavMail, I want to confirm that DavMail has been configured properly and is ...