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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31 views

How to turn on SMTP server on windows without depending on IIS? [on hold]

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 ...
0
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18 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 : ...
0
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2answers
21 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 ...
3
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0answers
25 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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votes
0answers
18 views

Cannot receive mail but can send mail | Postfix [closed]

I cannot receive email but I can send them. Can't figure out why. This is the mydestination I am using in Postfix's config file. mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain ...
0
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2answers
39 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 ...
0
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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 ...
1
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2answers
31 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 ...
1
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0answers
19 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, ...
1
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1answer
33 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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0answers
16 views

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" ...
1
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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 ...
1
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0answers
28 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 ...
0
votes
1answer
42 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. ...
1
vote
1answer
43 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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votes
1answer
26 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]: ...
0
votes
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 ...
0
votes
1answer
15 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 ...
0
votes
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 ...
0
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1answer
55 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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votes
0answers
17 views

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 ...
0
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1answer
54 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 ...
5
votes
1answer
151 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
29 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 ...
0
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1answer
30 views

Forward all SMTP traffic to anti-spam server except for authenticated SMTP?

Historically, we have handled SMTP traffic across a handful of multipurpose servers each with their own local spam-fighting stack. We've grown and this is no longer feasible to maintain. Now we have a ...
0
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1answer
46 views

Outbound SMTP email not being delivered, but still disappearing from the queue and pickup folder

After setting up my smtp server on a Windows 2012 server r2 on port 587. I tested the email functions by creating a text file labeled email with the following code inside: From:admin@mydomain.com ...
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votes
1answer
14 views

Hosted email routing service while downgrading domain [closed]

I'm at a situation where I need to close a domain on Google Apps due to inactivity, while closing the domain I would be interested to preserve emails sent to that domain. I understand that my ...
0
votes
1answer
58 views

New CentOS 7 server - Sending mail from a PHP application

Apologies for the newbie question but i'm hoping someone can provide me with some help/steps. I am in the process of migrating a website from a managed shared hosting account online to a new CentOS 7 ...
0
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0answers
24 views

Updated hostname of server but old hostname still appearing appearing in Postfix logs?

Been having some trouble with emails bouncing when being sent to certain addresses from our CentOS 6.4 Media Temple DV server. I am no expert but after checking the mail logs it appeared that they ...
-2
votes
1answer
16 views

TLS for outgoing mail (following ISPmail) not working

I built my mailserver on a vserver after the ISPmail tutorial (https://workaround.org/ispmail/wheezy) (which is awesome). The only remaining problem is that it does not seem to use TLS with outgoing ...
-1
votes
1answer
34 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 ...
0
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0answers
32 views

Mail server still BLACKLISTED after fix the issue

I have an Exchange 2007. CBL has blacklisted me because: This IP address is HELO'ing as "localhost.localdomain". If you test and helos properly means something OTHER than your mail server ...
1
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1answer
58 views

How to unassign self-signed cert from SMTP on Exchange 2010?

We have a GoDaddy wildcard certificate that we have installed into Exchange 2010 and is successfully used on IIS connections for OWA. We have assigned this certificate to the SMTP Service as well as ...
0
votes
1answer
42 views

SMTP-Mailing with PHP works - but not with PHP-Cli

I mentioned a strange behavior on my webpage: If I try to use Joomla to send Mails via SMTP it works fine; no problem at all. But: If I try to use a PHP-CLI-Script the action fails (same source ...
3
votes
2answers
110 views

Is setting up my own SMTP server to send email a waste of time with regards to deliverability?

I have a dedicated host serving a few domains I manage. I host my own email and IMAP server. The server is at buildoneforme.com with IP address 144.76.81.247. I think reverse DNS is working: $ host ...
2
votes
2answers
30 views

Where do these “single-dot” smtp connection failures come from?

I'm running a mailserver based on postfix. There are a lot of connection failures like this: Transcript of session follows. Out: 220 hostname.tld ESMTP Postfix In: . Out: 502 5.5.2 Error: command ...
0
votes
1answer
16 views

Mailman not integrating with postfix properly

I installed postfix on my local machine and able to send mails to local users i.e. shivams in my case which is username of the account. Also i am able to send mail outside of my machine for ex. ...
1
vote
1answer
37 views

Postfix: Set custom SMTP Banner based on address used to access server

The Postfix parameter smtpd_banner sets the text of a server's SMTP greeting banner. The default setting is: smtpd_banner = $myhostname ESMTP $mail_name My mail server has several unique IP ...
1
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1answer
32 views

Outbound emails not being signed with DKIM using Postfix on Centos

I have been using phpmailer for my emails and i had dkim working correctly with this. I have a key mail._domainkey.domain.com. I have validated my past emails with http://www.mail-tester.com/ and i ...
0
votes
1answer
48 views

What directory permissions does Postfix require to copy mail into a users maildir folder?

I have postfix setup and running. Everything seems good other than the directory permission errors. In the past i accidentally ran chown -R apache / which as you can imagine broke a crazy amount of ...
0
votes
1answer
63 views

Google Apps with internally/customer hosted SMTP relay - (not using smtp-relay.gmail.com service)

We are using Google Apps for our email service, and send a bulk of around 15k emails a day from our internal relay server (its outbound only, no open-relay) to customers. Recently, we ended up ...
0
votes
0answers
69 views

530 5.7.0 must starttls command first

I have installed postfix and davecot into my server. And I tried to test it to send email. But I got the error message: 530 5.7.0 Must issue a STARTTLS command first after telnet localhost smtp, ...
4
votes
1answer
114 views

Postfix reject_unknown_reverse_client_hostname: replace default unknown_client_reject_code (450) to 550. Why/When I should not?

In the daily battle against SPAM, there have been several times when I've been tempted to heavily enforce DNS requirements from clients connecting from the wild Internet. In detail, I would have ...
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votes
1answer
75 views

What's the difference between postfix/smtp and postfix/smtpd

A bit confused when reading through the logs of my smtp/mail server, I'm turning this questions to you guys. In the maillog files I'm seeing entries for postfix/smtp as well as postfix/smtpd. I can ...
0
votes
1answer
35 views

possible for all outbound smtp to run through proxy?

Is it possible to setup my centos 6.5 so all outgoing port 25 is run through a proxy. I have incoming smtp/port 25 coming to my mail server through HAproxy but i would like the outgoing to do the same ...
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votes
1answer
34 views

Forwarding emails to external domains - aliases vs mda sieve script?

There are 2 points in the flow of a incoming email where emails can be forwarded: As soon as aliases are expanded (setting the target email as alias target) As soon as mails are handed over to the ...
2
votes
1answer
195 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) ...
0
votes
0answers
31 views

IIS 6 SMTP service stops working after server restart

I'm currently wrestling with IIS6 SMTP service not working properly when the server is restarted. This has only just started happening in the last month and struggling to pin point the issue. I ...
1
vote
1answer
25 views

SMTP server for testing purposes with a few specific requirements [closed]

As our company started doing development work on their on-line product they used a gmail address for testing purposes, using '+' notation to deliver all test e-mails to a single mailbox. Over time ...
0
votes
2answers
57 views

Postfix spam abuse [duplicate]

I have a terrible problem, my joomla website is being abused to massively send spam. I have no clue on what is actually happening, but my postfix mail queue is constantly filled with thousands of spam ...