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• Can't connect to smtp (postfix, dovecot) after making a change and trying to change it back

  - by UberBrainChild

  I am using postfix and dovecot along with zpanel and I tried enabling SSL and then turned it off as I did not have SSL configured yet and I realized it was a bit stupid at the time. I am using CentOS 6.4. I get the following error in the mail log. (I changed my host name to "myhostname" and my domain to "mydomain.com") Oct 20 01:49:06 myhostname…

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• How SMTP server works? need an understanding

  - by Rajeev

  Hi, I am looking for understanding on how SMTP server works in an environment? example, if I wish to run only SMTP server on windows 2008 for an explicit application, which is running on it's web serer, app. server and DB server. Do i need to register the domain so as to send emails from my domain, if i wish to send emails to some users from…

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• Need a free SMTP service

  - by Axsuul

  My ISP SMTP server is so slow and is picky on what type of e-mails it allows. I need a new SMTP service and it needs to be free. I run a linux server but don't have the time to set up Postfix right now. Also, I don't want to use Gmail's SMTP server because it puts your gmail e-mail address as the sender. Thanks!

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• Google SMTP settings not sending email

  - by Baboon

  I am having a hard time making the email sending in GitLab to work (changing email in profile settings). My server has exim4, I can tell its working because if I do simple mail() in PHP, it thus sends the email to the recipient. Now, in GitLab seems that it wasn't. So I modified productions.rb to have SMTP settings, and use Google SMTP: …

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• Does an SMTP request contain host header information (or just the IP of the targeted SMTP server)?

  - by Olaf

  We are using an external commercial smtp server for our newsletters (sending them through .NET components), and they offer two smtp URLs - smtp.critsend.com and fast.critsend.com -, and the second one is reserved for sending singular emails, the first one for bulk. Using nslookup shows that both resolve to the same 4 IP addresses…

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• Configure Domino to use SMTP routing and hMailServer

  - by Sébastien Lachance

  I have been trying for a couple of days to set up a Domino 8.5 server. Basically, I want everything to be run inside a local network. Right now I can send email to other user in the Domino directory without any mail address. I am pretty new to all this stuff, so maybe the answer will be really obvious. What I need to do is be…

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• Configure SMTP server windows

  - by Jake

  I am configuring a local network and for some reason I can't get server to send an email. I already install the SMTP server and configured using this tutorial http://www.itsolutionskb.com/2008/11/installing-and-configuring-windows-server-2008-smtp-server/ but when I try to send an email using code, the email gets pickedup from…

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• Block SMTP connections from mail domains which don't themselves accept SMTP connection.

  - by bignose

  I'm administrating a mail service for a small business. Their mail host's internet connection is an ADSL service with a permanent IP address. Unfortunately, many misconfigured mail systems will happily deliver to this host, but, when the host attempts to send mail back (e.g. a bounce notice, or a normal response from…

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• SMTP Server setting on Windows 2008 R2

  - by user223298

  I am very very new to this and just trying to configure SMTP virtual server. I have followed a few threads to get it all running, but the mails are not being delivered. What I have done so far - 1) Install SMTP server. 2) SMTP server Properties General Tab - IP address is set to 'All Unassigned'. Access Tab -…

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• How to send mail from ASP.NET with IIS6 SMTP in a dedicated server?

  - by Julio César

  Hi. I'm trying to configure a dedicated server that runs ASP.NET to send mail through the local IIS SMTP server but mail is getting stuck in the Queue folder and doesn't get delivered. I'm using this code in an .aspx page to test: <%@ Page Language="C#" AutoEventWireup="true" %> <% new…

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• Problems sending email using .Net's SmtpClient

  - by Jason Haley

  I've been looking through questions on Stackoverflow and Serverfault but haven't found the same problem mentioned - though that may be because I just don't know enough about how email works to understand that some of the questions are really the same as mine ... here's my situation: I have a web…

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• I need to set-up the blocked machine to relay to the unblocked machine using a different port

  - by Zain Ally

  I have two Windows Server 2003 machines sitting in a network. Server B has port 25 open and can relay emails to the local network's smtp server. Server A does not have port 25 open. How can I set it up to send emails through another port to the SMTP server? I am thinking if I can setup a local…

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• Choose relayhost based on the postfix smtpd instance

  - by Zizzencs

  I'd like to setup a postfix host (using RHEL 5.4's default postfix, which is version 2.3) with the following characteristics: an SMTP listener listens on 10.0.0.1:25 and relays all e-mails to 10.0.0.1:2525 an SMTP listener listens on 10.0.0.1:2525 and relays all e-mails to 10.0.0.2:25 …

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• Problem with Free SMTP Server in php code

  - by Nuha

  I wrote php code for use to contact us form but I can not find free SMTP server to use it. I Try to use SMTP Server For Gmail but I found this error. Warning: mail() [function.mail]: "sendmail_from" not set in php.ini or custom "From:" header missing in …

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• PHPMailer with GMail: SMTP Error

  - by Abs

  Hello all, I am making use of PHPMailer to send mail through GMail. The code I use is straight from a tutorial and it works perfectly on my laptop. However, testing this on a Windows 2003 Server - it seems to always return an SMPT error: SMTP Error: Could not…

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• Postfix SMTP auth not working with virtual mailboxes + SASL + Courier userdb

  - by Greg K

  So I've read a variety of tutorials and how-to's and I'm struggling to make sense of how to get SMTP auth working with virtual mailboxes in Postfix. I used this Ubuntu tutorial to get set up. I'm using Courier-IMAP and POP3 for reading mail which seems to be…

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• Email client wont connect to SMTP Authentication server

  - by Jason

  Im having trouble installing SMTH Auth for my ubuntu email server. I have followed ubuntu own guide for SMTH AUT (https://help.ubuntu.com/14.04/serverguide/postfix.html). But my email client thunderbird is giving this error " lost connection to SMTP-client…

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• Virtual SMTP not sending mails

  - by DoStuffZ

  Hi I have been googling for the better part of the last two hours without finding any conclusion. My mails are not being sent from the production webserver. If I stop/start the Virtual SMTP I get this in the event log: No usable TLS server certificate for…

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• Windows Server 2008 SMTP & POP3 Configuration

  - by Alex Hope O'Connor

  This is the first time I have ever configured a VPS server without 3rd party applications such as Plesk control panel. I have got most functionality working in all my websites except I am very unsure as to how I can setup my email functionality on this new…

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• do not require smtp authentication for a specific domain using hMail server

  - by toryan

  One of my clients has a needlessly complex e-mail setup for a couple of domains, which is causing problems when they try to send e-mail between them. They have a couple of domains where mail follows a slightly weird path: Users connect to an Exchange…

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• Exchange Online SMTP Not Working With Any Email Client

  - by emre nevayeshirazi

  I am trying to switch our company mail server to exchange online. I have successfully added my domain and users and can send and receive mails through Outlook Web App. I can also send and receive if I configure my Outlook 2013 client using Exchange…

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• Inconsistent SMTP Access

  - by Mike Hanson

  I have a mail server setup on Windows Server 2008. All was working fine, until I wanted to map a drive on the server so that I can access files on another machine. Windows prompted me to configure Network Discovery, which I did with the…

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• Suddenly can't send E-Mails with Apple Mail to Gmail SMTP

  - by slhck

  Hi all, I have a weird problem that started just today. I am using Apple Mail on a Leopard machine, connecting to Gmail. Fetching e-mail works just fine. My SMTP settings are also correct. Still, I can't send mail, it will display a pop…

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• SMTP server on Win2008, SPF ecc

  - by Ronnie

  I want be able to send outgoing email from my website. I want to setup Win2008 smtp to be able to send them respecting all the spam rules. My checklist is: the smtp should be able to accept outgoing email only from internal sites: I…

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• Reverse DNS does not match SMTP banner vs Reverse DNS mismatch

  - by MadBoy

  I have to make decision whether my Reverse DNS should match SMTP banner but Reverse DNS to DNS and vice versa stays different or vice versa. Which one to choose? I have an 2x Exchange 2010 server with one SMTP Sender with TMG 2010.…

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