Tagged Questions

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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0
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1answer
69 views

SMTP on IIS 7.5 spam?

I have some problem with SMTP server, maybe, with some robot, malware? Log looks like this: 2013-07-15 19:52:52 127.0.0.1 kasandra SMTPSVC1 KASANDRA 127.0.0.1 0 QUIT - kasandra 240 100044 133 3335 ...
0
votes
2answers
655 views

Gmail is blocking our email, and the IP address listed in the returned email is not our main mail address

Our mx records point to a different IP address than our main public address. However the mail being sent, SMTP is pointing to our main public IP address. The email using the address that SMTP is using ...
0
votes
1answer
25 views

Make sure that my local SMTP server uses the orginal gateway

I have a server that connects via VPN to another server. Over this connection my application does it's work. But, that same application has to send emails as well. It has to do this via the local IIS ...
2
votes
1answer
864 views

Obtaining scans from HP LaserJet CM2320mf via email

I am trying, since I purchased the laser printer, to use the scan to email functionality, so far to no success and no lack of trying. The printer does not support sending emails via authentication. ...
0
votes
1answer
44 views

Why specify host for SMTP? [closed]

I'm sending emails using gmail's SMTP API. You can specify the host. I don't yet have a domain name so have set this as the IP of my production server. I presume setting the host makes it less ...
0
votes
1answer
76 views

How soon after getting a 400-class SMTP error will SendMail try connecting to a backup MX record/host?

CentOS | Sendmail 8.14 Hi All, I couldn't find this in the batbook. If SendMail attempts to deliver an email to a primary MX record and gets a 400-class error back, how quickly does it try the ...
0
votes
1answer
32 views

Manage Lotus Domino mail with SugarCRM

anyone knows how configure SugarCRM (standard IMAP I suppose) with Lotus Domino 8.5? I have it configured, SMTP mail test works fine, but folders doesn't appear except INBOX (I'm using standard IMAP ...
0
votes
1answer
271 views

Have Exchange/Outlook process html tags in SMTP mail

I am working with a third party application that sends simple SMTP email messages. The application doesn't respect line breaks or multiple spaces so the resulting email is barely legible. Since the ...
0
votes
1answer
984 views

SMTP server works, but telnet to port 25 does not

I am running a lightweight SMTP server for processing incoming emails. I am using https://github.com/kennethreitz/inbox.py. I opened port 25 in my firewall and am running the server at 0.0.0.0:25. ...
1
vote
1answer
303 views

Debugging sendmail - dsn=5.0.0

I am getting alot of the following messages from an ISP when sending out emails. Is there any way to get more information from these ? Users are reporting that they are not receiving any emails? ...
1
vote
1answer
53 views

How much mail will be lost if I only support SMTPS?

If I configure my locally hosted SMTP server to only accept SMTPS connections (secure SMTP port 465/587), how much mail will I lose because sender(s) don't support sending on SMTPS? Are the major ...
0
votes
0answers
119 views

Mails bounce because of invalid character ('@') in username

I have a working exim setup with virtual users, working alright, except for when I try to send email to certain servers. These servers reject my emails because of #5.1.3 Invalid character ('@') in ...
-1
votes
2answers
70 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 ...
0
votes
1answer
147 views

Pipe email to script, but only for a single user [transport map does not work]

I'm running a mail server on Ubuntu with Postfix, Amavisd, and virtual users through MySQL. I'd like to have the email body piped through an external script upon receipt, but only for one particular ...
0
votes
2answers
92 views

Emails reaching SPAM | SMTP Settings

We have a Ruby application hosted on an AWS Instance. We are sending emails from our application using the following setting in our code to send emails from our front end, ...
0
votes
1answer
165 views

Postfix SASL SMTP authentication

I installed Postfix & Dovecot on Debian. Then I tried using SMTP authentication according to this guide: http://www.postfix.org/SASL_README.html Unfortunately the following test tails: telnet ...
-5
votes
1answer
783 views

Simple Linux SMTP Server [closed]

I need to provide 3 SMTP servers for clients to use for printers and scanners that require an SMTP server to send email out, they will be load balanced with DNS round robin. All I need it to do is ...
0
votes
1answer
514 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 ...
7
votes
4answers
2k views

Legitimate reasons SMTP “MAIL FROM:” will not match “From:” Header in DATA

Is there ever a legitimate reason for the SMTP “MAIL FROM:” field to not match the “From:” field in the DATA section of a message, besides mailing lists? From ...
2
votes
1answer
696 views

Postfix + SASLAUTHD + MySQL authentication problems

I've been trying to sort this out for the past 6 hours or so, this is the error message I'm facing (Running CentOS x64): /var/log/maillog: Jun 22 20:42:49 ptroa postfix/smtpd[10130]: warning: SASL ...
3
votes
2answers
624 views

How to copy outgoing messages on sendmail

I've searched the serverfault and Google, but did not find anything related to my question yet. So, I have a customer that wants to read all emails sent by his employees. I've configured a VPS with ...
0
votes
1answer
248 views

Postfix drops all spam, but shouldn't do this

i'm using a mailserver setup with postfix, amavis and spamassassin. Some parts of my current configuration (Ubuntu 12.04.2): /etc/amavis/conf.d/20-debian_defaults $sa_spam_subject_tag = '***SPAM*** ...
0
votes
1answer
93 views

Email delivery to a user name that is a long hex string

One of my mail servers (postfix if it matters) has been target of what seems to me to be an attack. The attacker tries to deliver messages to a non-existent user formed as a long hex string with SMTP ...
0
votes
1answer
58 views

What postfix does if it is unable to deliver a message?

If I send a message from postfixA -> smartHost postfixB -> smartHost postfixC -> exchange and only postfixC does MX lookup and it is unable to deliver the message no matter if it is a hard ...
1
vote
1answer
35 views

how many emails were opened, clicked on, failed, etc [closed]

So I recently started using a "SMTP relay server provider" and was curious how they do some of the things that they do. In particular, they tell you the following things: Outbound Sent Failed ...
0
votes
1answer
78 views

Exchange 2003 smtp collector delivery restriction

In a Exchange 2003 the SMTP collector has the 'Delivery Restriction' configurated to deny for all except for who is in a security group mail-enabled (called 'InternetMail'). There are user ...
-1
votes
1answer
94 views

How to save addresses from bounced messages in Exim 4?

I need to save all bounces in a database, so I can query it from my application and not mail to any address that bounced more than X times. If I recall correctly, Postfix allows to pipe messages to ...
0
votes
1answer
37 views

How can I view transfer log information for Exchange 2010?

We're running an Exchange 2010 server in an Active Directory environment. It has no problem sending emails to 99% of recipients. However there are some who get a bounce and error: #550 4.4.7 ...
-1
votes
1answer
308 views

Why am I unable to send mail? [closed]

I installed iredmail, and used it to set up a mail server on Debian 7 based VPS. Everything went fine, I can send and receive email via webmail. However on trying to send mail via SMTP on a client ...
1
vote
1answer
842 views

Exim SMTP synchronization error when PIPELINING

I am sending email messages from a PHP script to an Exim 4.71 server via SMTP. The server advertises pipelining so I am trying to take advantage of it. However, when I read back the return codes I ...
2
votes
2answers
839 views

Postfix - accept all email to any user at any domain

I need to configure an SMTP server to accept any email to any address that might happen to reach it on port 25 and deliver it to a local mailbox (i.e. a spam sinkhole) The default supported MTA on my ...
0
votes
0answers
215 views

Request Tracker 4.0 email setup

I am having a problem with setting up Request Tracker 4, with email configuration. My request tracker url is http://rt.example.com/rt. I have smtp mail server already configured in a separate machine ...
0
votes
0answers
116 views

SMTP relay anti-relaying and LIMIT/QUOTA

I need some help to face this problem. I have 2 LAN connected to the same router. My first LAN is the office LAN and left on the internet with one public IP address. My second LAN is the datacenter ...
-1
votes
1answer
228 views

Something keeps connecting to Dovecot and Postfix

My Dovecot mail server and Postfix MTA seems to be generating logs about attempts to login from localhost. How could I investigate this issue? Log excerpt: Jun 8 09:36:31 mailserver ...
0
votes
0answers
965 views

451 Timeout trying to verify RCPT errors from some external contacts

Outside contacts at two companies report messages they sent to us return with the following message: 451 Timeout trying to verify RCPT validemail@ourdomain.com for domain One of the companies ...
1
vote
1answer
443 views

SMTP Set up - where do I configure mail accounts on Windows Server 2008?

I know about MX records, have configured SMTP and mail leaves my PICKUP folder on inetroot folder within Windows Server 2008 but I am stumped on where I actually configure the email addresses before I ...
1
vote
1answer
59 views

Advertise NO-SOLICITING (RFC3865)

Does it bring anything to specify the Solicitation class keywords in Advertise NO-SOLICITING as per RFC-3865? For instance: dom.spammer:ADLT,dom.listing:ADV
2
votes
2answers
236 views

My Email Server is rejecting incoming mail

I've got a Windows 2008 Web Server and have just installed Smartermail Mail Server Software. The server will send messages but the replies bounce back. I have attached my dns entries Ports 25 and ...
1
vote
2answers
124 views

How do I configure Postfix with recipient verification?

I have Postfix 6.6. When I send a newsletter blast from our SMTP server, many of the recipient emails are not valid and so the spam gateway on the receiving mail server (different server) gets ...
1
vote
1answer
508 views

Timeout error in all my apps for every call to smtp servers

On my VPS (a tophost.it "TopServer" with Ubuntu 12.04 LTS), since few days all my apps are became unable to send emails. All I could learn from the logs is that every request goes timeout. I then ...
0
votes
1answer
47 views

Will Email sent from a 3rd Party SMTP service get classified spam?

I have a web application that I developed. I was originally using the Google Apps smtp servers for the outbound emails generated from the application for user notifications. As use increased Google ...
0
votes
1answer
66 views

Avoid Drop folder in SMTP settings IIS7

I have a Domain, let's say it's example.com I have an IIS7 server, example.com is pointing to that IP and the Reverse DNS is also set to example.com. The e-mail service for this domain is handled by ...
13
votes
2answers
684 views

Gratuitous CRLF in Subject: line - why is it there, and is it legal?

I'm running into a problem with a NAGIOS system sending emails to a popular email-to-SMS service. The email-to-SMS service takes emails with text in the Subject: line, and sends them on to the mobile ...
-8
votes
3answers
101 views

“Mail server” on small LAN network [closed]

What is the best way to go about the following issue? There are about 7 machines under Win XP Pro, each has its own email client (Outlook 2007) with own accounts (eg. gmail, yahoo etc.) I want to ...
1
vote
2answers
410 views

Sendmail - exim4, postfix, Drupal SMTP - none working

I want to send emails from my Debian 6 server. I only want to send. I've followed every set of instructions I can find for Sendmail, Exim4 and Postfix and can not get any working. I tried the SMTP ...
0
votes
1answer
125 views

How is a sender verified with Gmail's 'Send Mail As' feature?

I have an email account info@example.com with mail.live.com . I also have a Gmail account. I have set up the 'Send mail as' feature in Gmail to send mail as info@example.com, and this works ...
0
votes
1answer
188 views

libvirt vm cant connect to smtp

I have a problem with one of my virtual machines. In my Setup the kvm/libvirt hypervisor acts as the firewall and does all the NAT. There is 1 virtual network (virbr2) for all of the virtual machines. ...
1
vote
1answer
124 views

Amazon SES not working from Rackspace Servers

Has anyone encountered a problem where they cannot connect to email-smtp.us-east-1.amazonaws.com for SMTP from a Rackspace server? WHen I ping from a rackspace server there is always 100% packet loss. ...
1
vote
1answer
1k views

Enabling Basic Authentication on Exchange 2010 SP1

Firstly, I know nothing about how exchange operates and what is and isn't possible. We're trying to send mail from our webserver (AWS) through our own mail server(In house) but for this we need an ...
0
votes
2answers
4k views

Postfix & Gmail: Authentication Required error

I configured Postfix using this guide. When I send a test E-Mail I get the following error message: May 23 15:36:26 VM11 postfix/smtp[15321]: connect to smtp.gmail.com[2a00:1450:4001:c02::6d]:587: ...