SMTP is the Simple Mail Transfer Protocol, the most recent standard of which is defined in RFC 5321. It's the Internet standard for sending and receiving email.

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Catch incoming email and then deliver to original recipient on sendmail

in the company I work for there are a user that is making bad use of the email, but to have evidence of what he is doing we need to intercept all the incoming email to him and all outgoing email from ...
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1answer
52 views

Exchange 2010 is trying to relay messages for delivery

I am using Exchange 2010 on premises. I am in the process of setting up a SMTP proxy that will receive all messages coming into the office, log them, then forward them to my exchange server for local ...
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92 views

IIS SMTP TLS encryption issue

I enabled TLS in IIS SMTP Virtual Server with a self-signed server certificate. Made sure that the certificate has the FQDN of the server. Checked the TLS encryption checkbox in Virtual SMTP > ...
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410 views

SMTP Event Sinks in Windows 2008 R2

We use a 3rd party software to send Bulk Emails. The software does not provide options to add Email addresses in BCC. However, as per Compliance Rules, it is necessary for us to add a BCC address to ...
2
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148 views

Is is a good idea to put SMTP Shadow replication on the same VLAN as DAG replication?

We have a VLAN for DAG replication, Recoverpoint (SQL Data), and right now SMTP Shadow replication is going over with the production traffic. Should shadow replication be limited to the site? Should ...
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5k views

Exchange 2003 mail non-delivery (NDR), spam activity? events 7002 & 7004

Windows Server 2003 Small Business Server SP2 Exchange Version 6.5 (Build 7638.2: Service Pack 2) This network has been neglected and has been having email problems for years and was on many ...
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1answer
56 views

How to route select e-mails from Office 365 to another SMTP Server

I have set up an SAP system to act as an SMTP server on port 25000. The company uses Office 365 as its email provider. Is it possible to route/forward e-mails that are delivered to a specific e-mail ...
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59 views

iPhone SMTP Server errors with Regional Cell Carrier

I run an email server (CommuniGate Pro) under Red Hat Linux for our organization of about 200 employees. Many of our employees use their phones (iPhones 5 or later), to get their email. Some use IMAP ...
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80 views

Does IIS 6 Virtual SMTP Server support UTF/Unicode Subject Lines

I have a Windows 2008 R2 server running IIS 7.5 hosting a bunch of websites. These websites relay email through the IIS 6 Manager's Virtual SMTP Server. I'm trying to verify whether or not this ...
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3k views

Exchange 2010 SP3: 4.3.1 Insufficient system resources

We have Office 365 with a hybrid deployment. Our on-premise server is relaying email directly out to the web (not via EOP). domain-a.com is an accepted domain on our on-premise server; domain-b.com is ...
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1answer
152 views

SMTP Server will not send to connected VPN domain

I have a Windows 2012 web server that is connected to a company's VPN (vpn.company.com) to access network resources and needs to send emails to users of that company as well. When the web server is ...
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143 views

SMTP as SmartHost for SendMail

My general task is following: We have workable application that sends mails to the users (that are registered in this application on some actions); Mails are sending using sendmail tool; In order to ...
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55 views

Sendmail dropping domain name from the username

I'm setting up Dovecot with Sendmail and I almost have it working (I think). The username for the account is a full email address such as "username@domain.com". What seems to be happening is that ...
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1answer
500 views

Sending email with Python/Django through Microsoft Exchange (IMAP)

I have a Django web application which sends email through a standard SMTP, but I want it to use a mailbox from the corporate Exchange server. I would like the emails sent from the application to be ...
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1answer
634 views

How to find which local process is sending spam on a Windows Server 2008 server

I am managing a Win Server 2008 system with a number of hosted web sites. Recently I found that something was sending spam through our SMTP server. The logs indicate that the connections were being ...
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1answer
478 views

Mail rejected if it is a reply to previous mail

I have the problem that a server is rejecting emails from my mail server if they are replies to previous mails. If a new mail is sent it can be delivered. Either I receive this error message host ...
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1answer
464 views

csf/lfd parameter that prevent smtp attacks?

I have a 4~5MB logwatch like this every day! someone like to hack my smtp: .... --------------------- sasl auth daemon Begin ------------------------ SASL Authentications failed 3965 Time(s) ...
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649 views

Two Exchange 2003 servers, Internet SMTP Connector using port 587 on smarthost: no longer internal connectivity between the Exchange servers

To summarize: I set things up (this is a virtual test/tutoring environment), broke internal connectivity by introducing Internet mail connectivity, figured out where the problem was, but now I'm ...
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1answer
461 views

Test/Dummy SMTP server for Windows

I would like to install a Test/Dummy SMTP server on a Windows 2008 server (virtual box). I just want to test my web application on the machine it self so I don't need the mails to go out on the ...
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1answer
135 views

Exchange 2007 Server - Sender unable to send one recipient in the domain

I have a mail server that serves multiple domains. I have 2 users that use a specific domain. User A does not experience any issues when sending and receiving mail. User B can send emails fine and ...
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1answer
1k views

SPF blocking some emails. How to complete disable it?

We have configured a SMTP server on IIS. We have not configured any SPF rule. Some emails are going straight to the badmail folder. Most of them have this error message: Address does not pass the ...
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1answer
496 views

Nginx Server with Ruby on Rails application SMTP Authentication Error

I'm developing a Rails app which when I run it locally, it's able to send emails through a gmail account via smtp. When I moved it to my sever (running Nginx), it comes up with the following error ...
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1answer
678 views

SMTP Error “check for new mail first”

I need to send e mail from a asp.net web site. The mail server is not in same network with the web server (it's in different location). Sometime it sends the mail without any error, but sometimes it ...
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490 views

UNIX SMTP client that supports MS Exchange proprietary (EXPS) authentication?

I'm trying to non-interactively send emails from Solaris through an Exchange 2007 server, but the Exchange server only allows Exchange Server authentication (OWA access is also disabled). Here's the ...
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1answer
340 views

Windows mail server that supports username wildcard aliases?

Is there any free mail server (in this case POP3) for Windows that supports aliases? e.g. User name: iboyd Aliases: ian@serverfault.com ian.*@serverfault.com ...
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517 views

How to parse e-mail bounce notifications

What options do I have to parse the e-mails that have bounced? I am receiving the bounce notification from e-mail servers but don't know what to do with it. Thanks Edit: I just want to know how to ...
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1answer
393 views

PTR Record Troubles

I am having a hell of a time getting our PTR record right. Our current PTR zone looks like this: $ttl 38400 @ IN SOA ns1.domain.com. admin.domain.com. ( 1268669139 10800 ...
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1answer
356 views

Email flow problem in Exchange 2003

I have a problem whit some emails that are not being delivered to the user inbox. The SMTP server on the DMZ that receives email from the internet is a Symantec Brigthmail Gateway, this server reports ...
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1answer
813 views

iis 7 caching PDF files causing wrong attachments to be sent

I've got a weird problem with my web server. I have a page that creates a PDF file and a button to send that same file as an attachment in an email. So I hit create, then press send, create, then ...
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273 views

How to limit SMTP delivery to hourly batches

Moved over from StackOverflow. Sorry if you saw it there first In an effort to keep us from being labeled spammers by major ISPs (in addition to SPF records, privacy policies, CANSPAM compliance and ...
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426 views

IIS SMTP Configure Delivery Status Notification Content

how can I configure IIS SMTP sever to not attach the original mail to the Delivery Status Notification messages? The problem is that when sending newsletters with fairly large attchemnts all these ...
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1answer
505 views

Windows 2003 SMTP virtual server, why emails are not delivered?

Configured Windows 2003 as my email client, everything works fine with POP3 (i'm able to recieve emails), the problem is with SMTP and i can't figure out how to find where excatly this problem is, ...
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1answer
480 views

How to force internal email through an smtp connector in exchange 2007

I have reason to force internal messages through an smtp connector. Can this be done?
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644 views

I want Lotus Domino to only send one email to users that are both recipients and members of a cc'ed lotus group

Lotus Domino 7 and now Lotus Domino 8.5 The scenario: A@mycompany writes an email to b@internet and cc's it to group@mycompany. A@mycompany is a member of group@mycompany. With the initial email ...
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457 views

SMTP Verb Error on MSExchange Server 2003

Every morning for the last two weeks or more I've had to reboot our Exchange Server and often I have to reboot it again during the day. We use a smarthost for sending our mail out and if I view the ...
0
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1answer
41 views

Can't send email on Windows Server 2008 with Mailenable

I've got a VPS running on Windows Server 2008 and I'm using Mailenable as an Email Server for POP3 and SMTP. I've had the VPS since January 2015, its my first time configuring a server by myself, but ...
0
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1answer
11 views

Exchange 2013 return message for old addresses

In my company there are two kind of smtp address in exchange 2013 recipients: j.deere@mycompany.com (old) john.deere@mycompany.com (new) Now I would like to remove all old addresses (j.deere) but I ...
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1answer
139 views

Getting a [550 5.1.1 Recipient not found] (Can't receive email) with CloudFlare

I'm having troubles with my email account. I'm using GoDaddy's Email service and the domains that are not connected to CloudFlare are operating just fine. The problem comes in with the domains that I ...
0
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1answer
201 views

SMTP Error (451): Failed to add recipient. Temporary lookup failure

Installed iRedMail on Debian Server Can Login to Roundcube Sending Mails from Roundcube results in the following error: SMTP Error (451): Failed to add recipient "XXX@mydomain.de". Temporary ...
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1answer
125 views

How can I configure a Haraka mail server to forward mails to another address on another domain?

I'd like to setup an Haraka mail server on a domain (let's say 'example.com') that will only act as a forwarding service to a 'gmail.com' email address. For the sake of the example let's say I'd like ...
0
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1answer
61 views

exim4: queue_run_max: not found

I need to manage the number of outgoing concurrent SMTP connections - other mail servers are complaining that I have more than 50 concurrent connections and throttling my outgoing mail. I googled and ...
0
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1answer
24 views

Exchange 2013 SMTP reply error not being sent

We are scanning to our exchange 2013 server from a scanning application that uses smtp, in the past when the mail exceeded the smtp size limit it would send an email with a link instead of the scanned ...
0
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1answer
845 views

Windows Server 2012 R2 IIS SMTP Server Will Not Send Emails

I have an existing SMTP server on our network that is used to send emails from a variety of printers, applications, etc... I have installed the IIS SMTP Server on a new Windows Server 2012 R2 server ...
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1answer
67 views

Exchange SMTP authentication issue with spammers

I have a single Exchange 2013 server with all the roles and it looks like it's being used by a botnet. It is sending mails every 10 minutes to a specific domain from a specific user. It is not an ...
0
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1answer
102 views

Iptables SMTP re-routing on a proxy

I'm lost... Any help would be appreciated :) I have a mailserver. Unfortunately, the provider deny the smtp 25. I don't want to use ESMTP or a vpn. So here is the project : I have a dedicated server ...
0
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1answer
43 views

How to make exim4 on Debian safe?

I am running exim4 on a vanilla Debian Stable system. The machine has proper DNS A and MX records. I want to use it as a mail server. SMTP with TLS already works fine for authenticated users. ...
0
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1answer
27 views

sending e-mails via sendmail using virtual-users

Currently my sendmail send e-mail with following header: Received: (from www-data@localhost) I want this header to be like: Received: (from contact@mydomain) but I am also hosting multiple ...
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132 views

Exchange 2010 not receiving some emails

Exchange 2010 not receiving emails from some senders. They receive the following email rejection message: Diagnostic information for administrators: Generating server: mail.domain.com.au ...
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1answer
218 views

Sendmail's MTA, MDA and SMTP 550 User Unknown forwarded to postmaster

I have two boxes running sendmail and configured as: MTA accepting connections from the outside world (mta.xyz.com) MDA accepting connections from internal network and storing them in user mailboxes ...
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1answer
464 views

Exim4 require TLS for all hosts but localhost

As my webmailer does not support STARTTLS and I want to enable relaying for everyone at localhost, I would like to have Exim advertise AUTH PLAIN and LOGIN only without TLS if the connection was ...