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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Connection refused by [127.0.0.1]

I am not very good with email servers. Here is what I need: I have a mailbox at fastmail.com with my custom domain (let's call it example.com). Now I want to set up my web server to relay emails ...
2
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2answers
1k views

Sent items via Exchange SMTP stored in the users mailbox

Using Exchange 2010 server, is there a way to store outgoing emails in the mailbox's sent items folder when an SMTP authenticated user is sending an email via the exchange server's SMTP server? (I.e ...
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3answers
2k views

Postfix refusing to relay mail from local client

I'm trying to get a python script to send mail (using smtplib.SMTP), but postfix is refusing to relay the message. I don't use the Ubuntu 10.10 Virtualmin server as a mail server (I happen to use ...
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3answers
12k views

How can email be resent that has been delivered to the Badmail folder in IIS?

We have IIS setup as an SMTP relay. A relay security error caused the outbound emails to be delivered to the badmail folder for the IIS SMTP Service. Is there any standard method for attempting to ...
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2answers
1k views

Rate limit exim per user basis

How can I implement "rate limit" in Exim so that every user in my exim can send specific number of emails per day. List A of Users can send 100 emails per day and the list B of users can send 500 ...
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5answers
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What host name should the SSL certificate for an SMTP server contain?

I have a server foo.example.com at 192.0.2.1 It runs exim to receive e-mail for several of my domains. My domains each have an MX record pointing to mx.example.com, which resolves to 192.0.2.1 If I ...
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1answer
23 views

Postfix sender acces restriction - Security breach?

We encounter security problems with our mail server and would like some advice. The story behind it On our mail server (Postfix 2.9.6 + Dovecot 2.1.7) we would like to be able to create restricted ...
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1answer
24 views

Is smart hosting to an A record a violation of RFC-5321 section 1?

I have a sendmail server configured to smarthost to a downstream resource. The configuration is currently: define(`SMART_HOST',`relay:[vip.example.local]')dnl Since it's sending the A record for ...
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6answers
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Do SPF Records For Primary Domain apply to subdomains?

I have a quick question regarding SPF records: Do they need to be present for all subdomains? Lets say that I have a TXT record with SPF info for domain.com Let's also say that I have a seperate ...
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3answers
1k views

Domino always server fails to send SMTP email at first attempt

In our logs, we find the below: Router: No messages transferred to fakedomain.com (host mx.fakedomain.com) via SMTP: The server is not responding. The server may be down or you may be experiencing ...
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0answers
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How to turn on SMTP server on windows without depending on IIS? [closed]

I am trying to find a way to enable/configure SMTP server on my windows 2008 R2 server. I would like to eventually have a php script that connect to this service/read/send emails. I found an ...
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1answer
1k views

Reverse DNS and Godaddy email server, What should it point to?

We are assigned 3 static IP addresses by our ISP and lately we have been having problems delivering our mail. We checked with Cloudmark and they suggested contacting our ISP to add a reverse DNS entry ...
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0answers
28 views

How Does Low Volume Affect (esp. live.com) Email Deliverability?

I've been sending emails for years with out any serious reputational shocks, but with low IP volumes (no bulk mail or automated transactional email), even with multiple Domain names. My Gmail ...
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3answers
14k views

Exchange Connector Won't Send to External Domains

I'm a developer trying to get my .Net application to send emails out through our Exchange server. I'm not an Exchange expert so I'll qualify that up front!! We've set up a receive Connector in ...
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1answer
3k views

Bounce message from gsmtp - weird message path

Please consider the following email headers from a message that was returned to the original sender. The multipart bounce message also contains the transcript (clear text + HTML) of the correspondence ...
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1answer
1k views

Configure Citadel to be Used For sending email using smtp

Sorry for this foolish question, but I have less knowldge about servers. So bear with me! I have configured Citadel as directed in linode documentation and can login using the front-end for accessing ...
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2answers
30 views

google compute enging postfix relay through gmail

I would like to send directly through gmail, since we have google apps and use gmail as our domain email. I would like to get rid of sendgrid so I can possibly not be marked as spam. I found this ...
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1answer
4k 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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0answers
19 views

mailjet with brimir (open source Ruby project) on debian doesn't send mail

I tired of searching a tip to be able to send mails with mailjet on my debian. I configured a dashboard for tickets (Brimir, Ruby open source plateform) Here is the link : ...
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2answers
42 views

smtp blues - external emails works, internal does not

I have 3 domains hosted on a remote server, but I am using other postfix server for SMTP only. So, I have two servers: mail.domain1.com - remote mail server, storing mailboxes and used for IMAP ...
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2answers
894 views

Postfix - Block email from non-existent local addresses

My question is very similar to this one, but for postfix. We keep getting emails from addresses like "accounting@example.com" delivered to our actual "@example.com" addresses. From my google ...
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1answer
12 views

How to configure exim4 to orelay email from a specific IP?

I am attempting to set up an SMTP relay server, using exim4. However, I have only one IP that I want to be allowed to send email through my server. Is this done using iptables or some configuration ...
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2answers
37 views

postfix authenticate disable smtp port 25, but 587

I am trying to make postfix not to auth users on port 25 but only on 587 and using STARTTLS. I have tried may different confs, but no success so far. main.cf: ... smtpd_sasl_auth_enable ...
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1answer
2k views

How to start SMTP [SMTP Virtual Server #1] through powershell or command prompt

Because of some error on my server my SMTP [SMTP Virtual Server #1] stop. I wanted to create job which will run periodic timely and check the SMTP server status, If its stop then it will start it ...
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1answer
229 views

Why would an SMTP client send a RSET (Reset) command?

I’m trying to understand how exactly an email is processed by Postfix – and some of the finer details of SMTP mail transactions. My short-term goal is to debug a proprietary (binary, closed source) ...
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0answers
21 views

IPTables, route specific port through VPN

I'm running my own mail server at home on a dynamic IP. Dynamic IPs are often blacklisted, so I currently send out mails through my provider's relay. I want to change that to sending mail directly, ...
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1answer
2k 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
34 views

postfix SMTP outgoing gateway server, Software RAID1 vs RAID1 + RAID 0 on 2 disks

I have this old smtp server that is currently running Windows 2003 and with EOL I want to move it to something that will continue to get security upgrades but at same time I want to improve ...
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11answers
50k views

IIS/SMTP - emails are stuck in mailroot/Queue

I'm trying to send e-mails via SMTP within the IIS pickup directory. Unfortunately the e-mails are just going into the mailroot/queue folder and stay there. They never actually get sent. Does ...
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votes
4answers
5k views

SMTP relay through GMail overrides “from:” address with “[me]@gmail.com”

I've been trying to figure out if this is a new "feature" or if there is an issue with my configuration. I'm using Ubuntu 10.04 Desktop with Postfix as MTA. My smtp (as opposed to smtpd) ...
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2answers
4k views

POSTFIX bouncing when destination is my domain

I am using provider mail hosting to send emails. On my Webserver I also have Postfix running and configured. Here is my main.cf smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no ...
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0answers
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email goes to spam when email body contain a anchor tag [duplicate]

i am facing a problem about email sending with a module named phpmailer. the problem is that, when i am tying to send a email contain a anchor tag as like <a href="example.com" ...
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0answers
21 views

Postfix SMTP authentication FROM [duplicate]

I have a Postfix server with authentication running. However I recently found out, that anyone authenticated may send mail from any account. Meaning user1 is logging in and may send the e-mail from ...
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0answers
29 views

Exchange sending QUIT after 220 ESMTP Status Ready

I am hoping someone can help with an issue we are experiencing between our smart host and our Exchange 2010 Server. When our smart host tries to deliver email to our exchange, we are met with a 451 ...
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1answer
45 views

Why don't I receive the emails forwarded by Postfix?

My desired Postfix configuration is to forward all incoming mails according to virtual aliases and be able to send outgoing mails via SMTP and TLS. Sending already works, but the forwarding does not. ...
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1answer
32 views

postfix/smtpd lost connection after AUTH from <server>[ip]

I try to send mail from a private LAN server to my private postfix server and I get this error, but I can't find its meanning: # /var/log/mail.log Jul 8 15:02:50 mail-srv postfix/smtpd[18222]: ...
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1answer
45 views

IIS/SMTP - Disable SSLv2 [duplicate]

I am trying to disable SSL2 on our IIS/SMTP server. We are using a Windows Server 2008 R2 Enterprise (64bit). We use the IIS6 Manager to manage the SMTP virtual servers. I have attempted numerous ...
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0answers
21 views

Windows Smtp Server administrator login

I newly setup Windows SMTP Server on Windows Server 2012 R2. Any account exception Administrator can send email. But in the case of Administrator account, mail server said "535 5.7.3 Authentication ...
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1answer
19 views

Implications of removing session size limit from SMTP Virtual Server

I am running into an issue in one of our applications whereby our SMTP server rejects mail: System.Net.Mail.SmtpException: Exceeded storage allocation. The server response was: 4.3.1 Session size ...
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1answer
30 views

Server 2012 Virtual SMTP Server not delivering messages

I am having a problem with my Virtual SMTP server on Windows Server 2012 Standard. I recently ported a clients Classic ASP hosting to a new server from a Server 2003 Standard box where the Classic ...
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1answer
59 views

How to add allowed relay IPs for Windows SMTP using command line or script

I have a long list of IP addresses I need to add as allowed relays to the built-in SMTP service on Windows Server 2008 R2 (IIS 7.5, but SMTP uses the old IIS 6.0 manager) I know how to add allowed ...
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1answer
1k views

Exchange 2010 delivery to postmaster 550 5.1.1 User unknown

Exchange 2010 has a distribution group setup called postmaster and the Email addresses associated with it are postmaster@example.com, postmaster@example.net etc Internal emails sent to postmaster ...
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3answers
8k views

SMTP don't work when try to send mail from mail clinet

Mail server works fine when send mail from server, but when I use some mail client it not work. I found this in logs: Jul 12 19:45:04 tvsite postfix/smtpd[3356]: warning: hostname adsl-bb29-l44 does ...
0
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1answer
30 views

Sending an email to multiple recipients via a mail relay, while hiding the recipients

Our software sends emails using Exchange. Typically each email foes to multiple recipients and we just send one email with multiple "to" addresses. We're moving to an SMTP-based email relay, where we ...
2
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1answer
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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0answers
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Recommended setup for F5 with multiple EXIM servers behind

I have following setup: 4 EXIM 4.80.1 servers. All mail relay clients are redhat linux , I use mailx command for testing relay from clients specified in "hostlist" on exim.conf Have valid cert ...
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1answer
56 views

SMTP: Setup TWO servers to receive / store emails the same at the same time

My question aims to clarify whether I can get a setup running, where Server A on 1 site receives email as is received at the same time by Server B on site two. The requirement is to have Server B be ...
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2answers
5k views

SMTP mails being rejected by receiver

I run a custom webshop where my system sends out different notifications. Unfortunately yesterday I started receiving a lot of rejected emails. It's not all emails being rejected, only a specific ...
5
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1answer
162 views

Windows Server 2012: Cannot install SMTP-Server, system always requires restart

I'm not able to install the "SMTP-Server" feature on a Windows 2012 server. The installation process always fails with a "restart required" message. After the restart and (re)starting the SMTP-Server ...
0
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1answer
1k views

Windows SMTP Service - Configure Smarthost for Specific Domains over different ports

I have a client that was recently acquired by a company. Their email system now resides on the parent company's network. Currently there is no VPN setup between my client and the parent company. I ...