Simple Mail Transfer Protocol is the protocol used for sending email.

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Postfix: SMTP, use port 587 rather than 465

I have set up a mail server on AWS EC2 using the instructions from Flurdy: http://flurdy.com/docs/postfix/ it has mostly gone well. My issue is that I would prefer to use SMTP port 587 with TLS ...
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1answer
99 views

Is it possible to use an outgoing SMTP server from Laos?

While traveling in Lao PDR, I've subscribed to an unlimited cellular data plan (at Lao Telecom) because I have to maintain some websites during my trip. Everything works fine (connection is even ...
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1answer
138 views

Setting up Ubuntu server to send mail

Can anybody point me in the right direction on how to set up my webserver so that the sites can send mail via phpmailer? I have installed postfix using sudo apt-get Then during the installation I ...
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202 views

Snort smtp rule detect given text

Very new and just learning some snort rules but looking to get a rule which looks for content of an email which contains the word test just for an example. alert tcp any 25 -> any any (msg:"test ...
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36 views

How to check email generated by WHMCS billing system before they are actually sent

The WHMCS billing system that I use sometimes generates wrong invoices (due to bug or me using it wrongly due to the complexity of the system) and this is being sent out via SMTP (for my case gmail) ...
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1answer
78 views

Disabling smtp authentication for local mail on same domain

I am very new to smtp and am looking for something to deal with the current situation: I have several servers running really old software (music automation) and they all need to report in daily via ...
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1answer
121 views

How to use a different SMTP mail relay for sending emails with a message size over 10MB

I use Amazon SES as a mail relay service for my emails as my server host blocks connections out on port 25. SES works great, however occasionally users send large attachments (>10MB). Whilst I could ...
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1answer
41 views

ip set for smtp mail failed

I config smtp server with postfix , and Debian 6. I set 1 ip from 4 Ips of server for smtp server mail.mydomain.com xxx.yyy.zzz.hhh but when I send mail with smtp server , Destination server ...
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1k views

Postfix smtp send error - what's wrong here?

I am currently setting up a new virtual private server with Debian Wheezy. I managed to install postfix, dovecot (IMAP) and MySQL. Up to now, I can successfully login via SSL with an external mail ...
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99 views

Google SMTP settings not sending email

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 ...
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52 views

SMTP Client implementation [closed]

I'm implementing SMTP client. What should the client do once it already sent the "." at the end of the mail, but didn't receive "250 Ok"? This is how the conversation between the client and server ...
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3answers
146 views

Every minute incoming, rejected connections to SMTP

I have a feeling my server is being lazily DDoS'ed, though, I have never experienced it before, so, I may be wrong. Every minute, my journal logs the following 3 entries: Nov 05 21:10:47 ...
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21 views

Is there a SMTP client that support adding custom MIME headers?

I'm looking for a WYSIWYG SMTP client that allows me to add custom MIME headers to outgoing messages. Is there one readily available?
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2answers
168 views

ipa.gov.newyork@usa.com is sending mail using our Synology mail server

This is scary and I don't know where it came from. I got a problem sending emails got an error SMTP error 452. As I searched the meaning of this I got "Too many recipients received this hour.." So ...
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1answer
2k views

NOQUEUE: reject: Relay access denied

I recently setup a mail server following the instructions on linode.com (https://library.linode.com/email/postfix/postfix2.9.6-dovecot2.0.19-mysql) except I am using postgreSQL instead of mySQL. ...
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2answers
674 views

DDoS attack on SMTP

I am not sure whether this is the right place to ask this. But now I am in a great difficult situation. Our server is undergoing SMTP DDoS attack. The mail service has been totally down. We have ...
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1answer
699 views

Mail server configuration on Ubuntu 12.04

This is kind of a basic question and it might sound stupid but I am new to this whole mail server thing and I am trying to learn how to setup one. I have a VPS server which runs Ubuntu 12.04 ...
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1answer
908 views

Testing SMTP via Telnet, “help” returns “500 unrecognized command”

When using PuTTY in Windows (I specify a mail server, Telnet protocol, and port 25), the "help" command returns "500 unrecognized command". This is strange since I expected to get some actual help. ...
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4answers
183 views

Is the SMTP of the ISP safe?

I am just curious, because I am using the SMTP of our ISP in my mailserver. Do you think it is safe to use, meaning can my ISP snoop in my emails? What do you think?
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224 views

telnet localhost 25 not working on company domain network with win7

when I try to access my own PC (already tried 127.0.0.1, 'PCNAME' etc.) with command prompt via SMTP it always displays the No Connection message. How do I configure my PC correctly so this is ...
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19 views

Different routes for different TLD's in postfix

This might come as an odd request. Thank you for looking at it. I am setting up a series of postfix+dovecot+mysql mail servers internally. I am having trouble figuring out how to make them both ...
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264 views

SMTP Server configuration in localhost

I have setup SMTP server on my linux (Ubuntu) server and send mail using PHPmailer. its works perfect. but i want to send mail throw my local host using that server..so how can i do that... i have ...
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2answers
98 views

Is “smtp” the only valid name for smtp server?

Is smtp the only valid name for smtp server? Or any name is valid. E.g. Is valid this too: mail9s2b.example.com or only this: smtp.example.com The guy on the hosting support told me that only ...
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1answer
30 views

Route traffic individually

My schools smtp server is only available while Im at school. I can proxy to a server at school through an ssh tunnel but then ALL of my traffic. I want to tunnel one thing only (The smtp ...
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2answers
94 views

Verifying which SMTP server software is used by remote server

I am trying to catalog which smtp servers are used in an heterogenous pool of servers, and so far I was doing : echo "HELO localhost" | telnet localhost 25 2>/dev/null | grep 220 #process the ...
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1answer
327 views

Can I change the Thunderbird SMTP, POP3 and IMAP server setting editing some file?

I'm right now in a massive email migration to Google Application (GMail). I must change all the server settings in each Thunderbird client of all my users. I have the Administrator password of each ...
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1answer
5k views

Centos - How to install an SMTP server, POP3 and IMAP to send email to Gmail, Yahoo, Hotmail, Live, Yandex?

i have a CentOS 6.4 in mediatemple.net, i need send email to Gmail, Hotmail, etc. I tried installing postfix, sendmail, dovecot, cyrus, procmail, spamassassin, etc., and even does not work because ...
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1answer
61 views

Why use googlemail smtp server instead of your server?

I ran into this post: Getting Postfix to work on Ubuntu with Gmail which describes how to use gmail as relayhost for postfix. And I'm wondering what would be the benefits of doing so? I have some ...
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110 views

Has Gmail just dropped the option to send mail through your own SMTP servers? [closed]

On my current gmail account, I have added an other email account I own to send email though my own smtp servers. This is easy to do in Settings > Accounts > Add another email address you own, in ...
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1answer
386 views

iCloud rejecting emails sent via smtp with error 550 5.7.0

I'm trying to set up msmtp with a MobileMe/iCloud account. I have 2 other accounts set up, and they both work just fine. But with the MobileMe account, I'm getting an error: msmtp: server message: ...
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1answer
909 views

How to configure Postfix so that I can authenticate via SMTP to localhost

I have a Postfix MTA configured to which I can perfectly log in from remote via SMTP (Thunderbird, Python, etc.) but when trying to use the same script with the same credentials while locally on the ...
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171 views

Why does postfix take so long time to receive emails from gmail?

How can I manually check for an email from the command line? How can I force postfix to receive/update emails? The email from gmail takes 8 minutes till it will be received by postfix. How can I ...
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1answer
36 views

Different Protocols with Email Client and WebMail

Can someone tell me if I have covered all Email protocols when using an Email client and Web Mail to send and receive email? Email client: POP -Receiving an email; IMAP -Receiving an ...
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1answer
176 views

Do spam filters block emails whose 'from' field's domain is different from SMTP server domain?

Consider an email sent from smtp.eumx.net: From: "John William" <john.wm@inter7.jp> Reply-To: john.wm@inter7.jp To: foobar@yahoo.com Cc: peter@gmail.com, mary@gmail.com, ... Note that the ...
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2answers
177 views

Is it possible to host a website in one server and host emails with this domain on another server?

I have 2 servers, one with hostgator and a second one which is much faster. I would like to use the server on Hostgator for Email and the other one (which is faster) for the website. For what I've ...
0
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1answer
52 views

retieving SMTP server and port

Is there a way to figure out the smtp server and port details for my company's email server ? I found from the outlook 2003 that we are using "Microsoft Exchange Server" and server name is ...
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1answer
1k views

Exchange Online SMTP Not Working With Any Email Client

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 ...
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0answers
889 views

Postfix : Connect to smtp.gmail.com[173.194.70.108]:587: Connection timed out

I was setting up Postfix on (Ubuntu 12.10). This is my main.cf file content : smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory ...
0
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1answer
1k views

Can't connect to SMTP server using PHP Mailer but can with Gmail?

I am getting the following error from PHP Mailer when running a script in my local PC: SMTP -> ERROR: Failed to connect to server: A connection attempt failed because the connected party did not ...
0
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1answer
119 views

fix pop3 connector on SBS 2003

I am attempting to get our SBS 3003 Server (yes I know it's old and outdated) to retrieve mail from our web mail provider via pop3 and send via SMTP through our web mail provider however I seem to ...
8
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1answer
6k views

The simplest way to set up a secure, IMAP, email server? [closed]

I would like to get rid of Google as an email provider, and set up a complete email solution on my dedicated server. The issue: I wish the setup to be as simple as possible, so that it wouldn’t be a ...
0
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2answers
241 views

All outgoing mail in VM should stay local

I have setup an Ubuntu 12.04 VM, which I use to test and develop magento shops. On this desktop VM I have an almost exact copy of the shop running. I prefer to use a desktop VM as this gives me the ...
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0answers
427 views

Use Thunderbird to send via Amazon SES

I'm trying to configure ThunderBird to send email messages using SMTP/Amazon SES. Amazon provides documentation on how to configure Outlook which should, in theory, mean that I could configure an ...
0
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2answers
474 views

How can I send an email?

This may sound like a bit of a stupid question, but I have an RFC 2822 standard email file: To: Mr Person <person@example.com> Subject: Finally Figured Out How To Send Emails! From: Josh Date: ...
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29 views

SMTP Port Filitering/Alternative Port

I am setting up Kerio Connect on a businss server, and have configured DNS records to point to new mail server. However i attempted a telnet from outside the network and recieved a 421 error. From ...
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2answers
623 views

How to find out what port is Exim 4 using for SMTP?

I'm trying to debug a problem with email sending on my home machine, possibly a router related problem. This is on Debian squeeze with Exim 4.72-6+squeeze3 (the default Exim 4 Debian package for this ...
0
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1answer
26 views

Application fails to send email with attahments

I have an application that emails reports as attachments. it works in all clients' sites except for one. i am using a gmail account there. all the settings are right, outlook express can send email ...
0
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1answer
100 views

Outlook 2010, will multiple PSTs cause problems

At the company where I work, the owners use POP/SMTP in Outlook to be able to keep an active multi-year history of emailed conversations. This history cannot be archived by date so they have been ...
0
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0answers
106 views

Hiding non-delivery report email address in outlook

I am sending an email from a specific address (i.e user@mydomain.com) with a unique sender address to do bounce-tracking(link)(link2). The issue is that when the message is received in outlook it is ...
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1answer
2k views

How can I send e-mails via Gmail SMTP via OpenSSL (on Windows)?

I know that the SMTP server requires TLS so I'm using OpenSSL (on Windows). openssl s_client -connect smtp.gmail.com:465 -crlf Now, I know that I have to encode a string (basically ...