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Questions tagged [smtp]

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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1answer
173 views

Protecting Windows SMTP service against the spam

I'm trying to use a Windows SMTP service on Windows Server 2008, but I can't understand how to secure it. Basically, if I keep Connection and Relay settings of SMTP Virtual Server to "All except the ...
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1answer
258 views

Change smtp name

My question is probably very easy to answer but I have been struggling with this the whole day. Actually, I would like to change my smtp.mail name and account that is shown as sending the emails in ...
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4answers
742 views

Solution for when your website's emails goes into yahoo or gmail spam folder [duplicate]

Possible Duplicate: Dedicated Server emails ending up in Junk It turned out that the previous person owning this ip address that I currently have for my website had spammed a lot! so Yahoo and ...
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2answers
909 views

smtp server in iis6/ win2003 - how to prevent hackers/spammers from using it

Anyone have any checklist for securing the smtp server on my web server so no one else can hack it and send spam fro it?
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3answers
163 views

Use one machine to send mail with 2 ip's

I need to config one SMTP server (sendmail) to send mail with 2 interfaces with different ip's depending server. For example: In same machine with to ip: 1.1.1.1 and 2.2.2.2 i need to send email a@a....
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3answers
1k views

HP Power Manager SMTP setup doesn't have space for username & password

Is there some way to configure HP Power Manager to not assume that there's an email server running locally? We recently acquired an HP T1500 G3 UPS, which we're trying to control using HP Power ...
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1answer
521 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
670 views

Exim log and send all mail for a given domain through another server

I administer a handful of shared web hosting servers. Recently, Yahoo has been deprioritizing/greylising all email sent from these servers. I am getting the dereaded 421 4.7.0 [TS02] Messages from my....
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2answers
499 views

How can I add a domain to an IIS 6 SMTP server so that it will relay for that domain?

How can I add a domain to an IIS 6 SMTP server so that it will relay for that domain? eg. If I have an email (from address: test@test.com) coming over the net from a server with IP address 1.2.3.4 ...
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3answers
626 views

Alternative SMTP-Proxy

Currently we are using bitdefender for mail servers to scan for spam, viruses and content filtering. We chose bitdefender as it receives all incoming emails and forwards them to our internal windows ...
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1answer
2k views

Exchange 2007 - Forward outbound mail to external SMTP server?

How do I configure Exchange Server 2007 to send outbound email thru an external SMTP server?
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2answers
2k views

Stop Delivery Status Notification (Failure) messages with Windows 2003 Server SMTP Server

How do I stop the SMTP Service on Windows 2003 (not exchange) from sending "Delivery Status Notification (Failure)" messages? I'm trying to prevent a trick that spammers use of sending a message to a ...
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1answer
4k views

Windows Server 2003 TCP port mapping / port forwarding

I've recently had an issue with the ISP of a few of my clients in which they've blocked TCP port 25 and de-commissioned their old mail server in lieu of Gmail. Also, our business email has been hosted ...
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3answers
7k views

How do I lock down Exchange 2007 to accept email from a specific range of IP addresses only?

I have implemented a new Exchange 2007 server running on Server 2008 in our domain. We previously used Exchange 2003 running on Server 2003 and I had locked the Default SMTP Connector down so that it ...
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1answer
148 views

SMail configure listening port/address?

I try to configure my smail-system. I want it to listen only on localhost/127.0.0.1 But when I check my system via nmap myredirectingdomainname.com it shows me the open port 25. Can you help me?...
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1answer
79 views

How would I test rblserver?

I'm using few rbl servers, and all of the sudden i see slowness, as soon as I remove all rblservers, it works very fast as it used too, other than removing one by one server is there a way to test rbl ...
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2answers
2k views

Block mails with local from-addresses from unauthenticated senders using courier-esmtpd

We run a small courier mail server (courier-esmtpd). It is configured to accept mail from authenticated clients without recipient restrictions and mail from everywhere to local addresses: *(at)...
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2answers
464 views

Surgemail DNS lookup failure

Just curious if anyone has any experience with Surgemail. I've set it up a couple times and never had an issue but my latest install keeps leaving outgoing messages in the queue with the error "DNS ...
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2answers
142 views

Exim - defer (-53): retry time not reached for any host

I'm an exim newbie - and have inherited a system running exim which is misbehaving. My instance has stopped sending emails. It is accepting messages into the queue, and is running with -q1h - each ...
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1answer
336 views

iredmail - Emails go out but don't come in

I setup an iredmail server so that my website can send registration emails and all that sort of thing. Problem is, it can send mail just fine (And even inbox) but it can't receive. Port 25 is open, ...
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1answer
1k views

Disable Postfix Open Relay

For the past few weeks someone has been using my server/postfix as a relay mail server. I tried everything that was posted in the hundred of other posts on this topics, but they are able to do it ...
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2answers
529 views

Google rejecting emails

Google is rejecting emails and send me <<< 550-5.7.1 [XXXX:XX:XX:XX::63] Our system has detected that this message does <<< 550-5.7.1 not meet IPv6 sending guidelines regarding PTR ...
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1answer
137 views

Replying on my email client (gmail) to a postfix forwarded email replies to my domain address instead of the original sender

I've set up postfix with dovecot on my server with the domain "example.com" Right now if an email is sent to one of my configured (no login) users their emails are shown in the /var/mail folder. ...
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2answers
49 views

exchange server incoming mail issue from internet

I have registered a domain under godaddy.com, and I have exchange server 2010. My question is my exchange server can send and receive emails on the same network(local network). I can also be able to ...
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2answers
2k views

Client can't connect to mail server with SMTP (postfix)

I have a mail server with postfix and dovecot. The mail server is on a VPS. At the moment, I can send/receive mails from the server itself. It seems to work OK. However, I'd like to use my mail ...
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1answer
154 views

Postfix SMTP authentication [duplicate]

I used this guide to create a mailserver for a small business: https://workaround.org/ispmail/wheezy. IMAP is working perfectly but i ran into an issue with SMTP and Authenticated SMTP. When i use an ...
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2answers
1k views

How do I reset user passwords in Xmail from the shell?

I have an old Xmail server running on a Gentoo Vmware box with full root access.I want to send a mail as user15 but can't remember the password.I have very basic Linux :( I am trying to reset the ...
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2answers
261 views

No sign of smtp login atampt with Outlook, Thunderbird

My mail server seems to be working when dealing mails in squirrelmail set up on my server. It also works, when i set up a gmail account for using my server as an smtp server for outgoing mails with ...
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1answer
263 views

Backup postfix relaying to itself

I have two machines running postfix, one is the primary mail server, the other is a backup relay. Both servers have an MX record, the backup having a lower priority. Most mail is relayed fine, but ...
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3answers
836 views

POP, SMTP and Mail Exchange servers are the same thing?

The MX record from nslookup tells the address of an MX server. In the email client, this address can actually be entered on both [incoming email server] and [outgoing email server], will this work?
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4answers
4k views

Claws Mail SMTP issue; cannot send

I am abandoning Thunderbird after it has slowly become a terrible, terrible piece of software for me. I have gotten everything set up with Claws, except sending. There are no official forums for this ...
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3answers
300 views

Is HTML content permitted in email header values?

In the process of troubleshooting an email message display issue, I noticed that an email header contained HTML. Example: From: <bob@foo.com> To: <john@foo2.com> Date: 11 Feb 13 12:00:...
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5answers
7k views

Open source SMTP gateway [closed]

I am looking to install a SMTP gateway for our MS Exchange server. I am looking for an open-source (and preferably free) solution that does anti-spam and anti-virus filtering. I am wondering if anyone ...
-1
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1answer
2k views

RFC for “Received: With ESMTPS”

Email Received: headers often say "With ESMTPS" but this phrase seems to have no standard describing it. is there an RFC for Protocol ESMTPS? RFC5321 only lists SMTP and ESMTP
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2answers
703 views

How do I secure my mail server?

How can I secure my SMTP port from being telnetted by external IPs?
-1
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2answers
389 views

Can MS Exchange 2010 act as an SMTP server?

We have a brand new Exchange 2010 based mail server and need to send e-mail from a remote website and some internal apps (like backup tools etc.). Can Exchange 2010 act as a SMTP server or we shall ...
-1
votes
2answers
976 views

Opening port 80 for outbound SMTP causing timeouts for apache [closed]

I have a (dv) Dedicated Virtual at Media Temple running Parallels/Plesk. Following this instruction, I was able to open an additional port and configure use of port 80 for use as SMTP outgoing mail ...
-1
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2answers
85 views

SPF records for a company with traveling (or remote) employees

I'm trying to set up a SPF record for the domain of a company whose employees use all sorts of SMTP servers.. But I think that line already contradicts itself ? Is this a problem ? They use several ...
-1
votes
2answers
457 views

how to set the FQDN on 2008 R2 server using the ip address?

From what I understood from my searches, to avoid the "Access denied - Invalid HELO name (See RFC2821 4.1.1.1)" when sending emails using the SMTP on a 2008 R2 server, its FQDN must be set and to ...
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4answers
6k views

What's the best SMTP provider? [closed]

I'm considering using an SMTP service to send mail for my web app. Google Apps is great and free, but limits to 500 outgoing per day. I've heard about AuthSMTP but it looks pricey. Any suggestions?
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2answers
2k views

Addition incoming SMTP listen on port 2525 with Zimbra 8

We use some service on Google Cloud, but they block out-going port 25 / 465 / 587, I need add a smtp port on our Zimbra server that listening on port 2525 for these service can send email. My Zimbra ...
-1
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2answers
70 views

E-mail reputation using our domain as the from sent by e-mail marketer

My boss wants to send a marketing e-mail to a large group of our customers. I personally feel that it's outside of our core business and don't support it, but that's about all I can do. Normally the ...
-1
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2answers
7k views

“Relay access denied” when sending email via php mail in zpanel [closed]

I have installed zpanel on my centos server i am using php mail function to send signup email to my clients. it was working fine on my virtualmin server but when i moved my site to zpanel server it is ...
-1
votes
4answers
8k views

Postfix setup on AWS EC2 using SMTP relay

On ec2 instance, the IP is dynamic, and if I want to use third party SMTP gateway such as sendgrid, what is the suggested values of the following fields? myorigin myhostname mydestination Assume my ...
-1
votes
2answers
150 views

Very simple “just redirect” email server [closed]

I've read that any decent domain must have the email addresses security@domain and abuse@domain. Also, I'll need postmaster@domain if I want to buy a certificate. I am running just a plain website on ...
-1
votes
3answers
3k views

Send Connector on Port 465

I recently confront a problem that i think it will become a major situation on the near future. My ISP blocked the port 25 against spamming. Now I'm forced to fix this situation on another port, so I ...
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2answers
133 views

Looking for a simple SMTP server that supports TLS and can run on Linux [duplicate]

Possible Duplicate: SMTP server for Linux with simple configuration I'm looking for a simple SMTP server that I can run without too much installation hastle and that which can also support TLS.
-1
votes
1answer
271 views

How to process sendmail queue when 25 port is blocked? [closed]

I have one VPS which forwards e-mails from one mailbox to another. Unfortunately ISP have blocked 25 port last week and since then I can't receive any e-mail from it. According to mailq there are 9000+...
-1
votes
2answers
747 views

Internal SMTP server no longer delivering to Google Mail

Our corporate email is hosted on Google Apps, along with 5 domains for various products. Internally (Behind our firewall, not exposed to the internet) we have an IIS server running Microsoft ESMTP ...
-1
votes
1answer
182 views

Secure cloud to internal Mail setup using UUCP or something more modern

Some of our Linux servers are going to be moved out into a cloud. But the servers need to be able to email our users internally and are required to use our domain name as sender. The server cannot ...