0
votes
0answers
10 views

force upstream smtp outbound through proxy

Upon inspection of emails sent outbound to external domains, the backend is revealed as being the true sender, rather than the proxy itself. When sending within the domain, from local user to another, ...
-2
votes
0answers
15 views

421 4.3.0 collect: Cannot write … (bfcommit, uid=0, gid=110): No such file or directory [on hold]

There are an issue: i want to use swiftmailer but when i try then the system says: # php yiic.php sendnotifications exception 'Swift_TransportException' with message 'Expected response code 250 ...
1
vote
1answer
39 views

Sending mail from PHP gives Unrouteable address

I have a Debian server running PHP and Exim4 (among other things of course). The PHP application is sending 1000s of emails every day all of which work fine, however I now have a new customer and my ...
1
vote
2answers
50 views

If I use postfix for mail relay, so is myhostname / mydestination important?

I use postfix to relay mail to 3rd party SMTP and never sent out email directly, and of course I never receive email. So If I set myhostname / mydestination to sth like fake.mydomain.com, which ...
0
votes
1answer
55 views

Email sent from my new server, being suspended by SMTP because “weird” hostname?

I have some problems sending emails from my server: I've been banned/suspended for abuse (IP blocked) by the SMTP server. This happens only on my new virtual server. Right to the question: is my new ...
0
votes
1answer
64 views

Random synchronization error on SMTP server

We can send mails across the network from 1 server to another via a centralized smtp server. However, the we get a synchronization error on the server randomly. So for example if we send a simple ...
1
vote
1answer
61 views

SMTPD restrictions

i'm looking for a bit of advice on Postfix restrictions configuration. I'm looking for a balanced configuration which properly rejects spam and unauthorized access retries. Lately, i've been reading ...
0
votes
2answers
55 views

How to stop or prevent Postfix / smtpd / Sasl brute forcing

There are numerous attempts to connect to my mail server in order to send mail either unauthenticated or to guess username and password to, I suppose, accomplish the same. Should I fight against ...
0
votes
1answer
58 views

Where does e-mail header “Received: from…” come from? [closed]

I sent myself an e-mail from my server to my gmail account, here is one of the headers (partially redacted): Received: from cpvds3xx.xxx.com (dev1.xxx.com. [209.51.132.xxx]) by mx.google.com ...
6
votes
2answers
245 views

Why is email being delivered normally despite an SPF “hardfail”?

I'm trying to figure out why forged email is being delivered to major email providers (gmail.com, outlook.com) even though email is marked with an SPF hardfail. The email is also delivered to ...
0
votes
1answer
37 views

Is extra “Received by” in mail headers bad and can I remove it?

I use our own VPS web and mail server to send out a newsletter regularly to 50,000 addresses. I am trying to improve deliverability and was looking through some of the thousands of bounce emails. One ...
1
vote
2answers
107 views

Exim on Centos - Configuring gmail smtp

I want to set up Exim to send the mails through my gmail (actually my domains google apps). I have added the router, transport and authenticator. Specifically: gmail_route: driver = manualroute ...
0
votes
2answers
46 views

Email flagget as spam or rejected by recipient mail server

I have configured smtp service on a windows 2008 server. All the emails sent by the smtp service are flagged as spam or they are rejected by the recipient of the email. In the header of the email I ...
0
votes
0answers
412 views

550 5.7.1 Message Rejected due to content restrictions

I have a server that for some reason, out of the blue is now having a huge amount of its email being rejected, coming back with 550 5.7.1 NDR's or various derivatives thereof. This just started ...
0
votes
2answers
67 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 ...
0
votes
1answer
42 views

Postfix mail from outside not received

I am using Dovecot with Postfix and virtual user/mailboxes. Everything works fine accepting receiving mail from outside (other domains named as the mailserver) I am able to: - send mail from my mail ...
2
votes
1answer
36 views

SMTP routing cases: same @domain as sender and different @domain

I would like to know what is the difference between sending an email to the same @domain as the sender and sending to a different domain. I cant really find a detailed explanation on the web. From ...
0
votes
1answer
66 views

What do I need to be able to send mass SMTP email efficiently? [closed]

I am creating a web application that allows users to send broadcast emails to a list of subscribers. Essentially, it's a mass emailer and autoresponder, like AWeber or Constant Contact or MailChimp. ...
-1
votes
2answers
74 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 ...
0
votes
0answers
56 views

Incoming mail flagged as spam

A customer of my company can no longer contact us via mail. Our mailserver keeps bouncing their email as spam. I've already contacted them but they say the problem lies with our server, not with ...
2
votes
1answer
63 views

Exim retry is Message based instead of host based? why

from what I understand exim retries are supposed to be HOST based, NOT message based. This seems to make sense to me; if a host's server is overloaded or otherwise telling you to "delay sending ...
0
votes
0answers
33 views

How can I prevent Sendmail from cutting off SMTP error responses from a recipient MTA in maillog?

CentOS 5.x | SendMail 8.14 I've noticed that Sendmail will occasionally cut off SMTP error responses in logs. For example: Jan 10 05:55:55 foobox sendmail[20998]: s1CStsdli020998: ...
2
votes
2answers
55 views

how to Dedupe email messages in exim mail server (Linux)

If a User is listed in multiple aliases or multiple mailing list or groups a message is sent to more than one of the aliases, mailing list or group the end User will receive multiple copies. How to ...
2
votes
2answers
99 views

vps: smtp working on server client (roundcube) but cannot be configured on desktop client

I've bought a VPS and installed Ubuntu 12.04 on it. I'm using Zpanel for my Control panel and everything seems to be configured well. I can even send and receive mails on my server itself, via the ...
0
votes
1answer
64 views

Postfix: can't send mail from remote client

I'm having issues sending mail from postfix. I believe my conf. is very standard, at the end it was put together from various guides. I'm trying to send mail from remote client (iOS Mail, and Mac OS X ...
0
votes
1answer
28 views

Exchange 2010 550 5.1.1 Recipient Rejected Error

About 3 weeks ago, we migrated our email solution from one hosted Exchange 2003 environment to another hosted Exchange 2010 environment. I currently have an outside user unable to send emails to our ...
1
vote
1answer
25 views

Exchange 2007 send as different user by default

Allow me to explain in detail. I have a client who runs 3 companies under the same roof. Each user has 3 exchange mailbox accounts (for each company domain) which they load under either Outlook 2007 ...
0
votes
1answer
64 views

Postfix relay mails from a single domain and IP

we have an Mdaemon server which redirects outbound mails to an external basic Postfix relayer. We have configured firewall rules (in front of postfix server) to accept smtp requests only from the ...
0
votes
2answers
427 views

SMTP -> ERROR: RCPT not accepted from server: 554 5.7.1 : Client host rejected: Access denied

I am trying to send mail through phpmailer with smtp.i am using the host which i am using on my outlook with same username and password.I am getting an error .can anyone help me how to fix this. My ...
2
votes
3answers
69 views

In a linux-based email server, how can one prohibit SMTP/IMAP/POP connections from clients while still using Webmail (Roundcube)?

With a fully functioning linux-based email server (running postfix/Dovecot) how can one disable the ability to connect to SMTP/POP3/IMAP with external mail clients (or telnet, etc) while still (and ...
2
votes
2answers
61 views

Postfix doesn't require authentication for local emails?

I've got a Postfix/Courier mail server (Authenticated with SASL/MySQL) all according to this tutorial. I'm currently running my server on Debian 6, it is a VPS. It works well as far as I can see but I ...
0
votes
1answer
156 views

TLS connect failed: error:140943FC:SSL routines:SSL3_READ_BYTES:sslv3 alert bad record mac while sending mail via Qmail

I'm trying to send e-mail to one of the biggest polish hosting companies and their servers are refusing to receive it with message: TLS connect failed: error:140943FC:SSL ...
0
votes
1answer
37 views

amazon ec2 smtp ipv6

I have an Amazon EC2 instance. My postfix server sometimes tries to send outbound emails (web form etc) to ipv6 addresses. It fails and the emails go into the queue. Is there a way to prevent ...
1
vote
2answers
110 views

Iptables blocking smtp

Iptables is blocking outgoing and incomming smtp on my server, although I specified it not to. My policies are DROP everything except what's specified. Changing policies to ACCEPT everything "solves" ...
0
votes
2answers
83 views

Why don’t SMTP servers just require all senders to be authenticated before accepting mail? [closed]

Why don’t SMTP servers just require all senders to be authenticated before accepting mail?
0
votes
1answer
457 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 ...
0
votes
0answers
20 views

centos rely access denied postfix send mail [duplicate]

I am trying to send mail from my centos using postfix configuration but getting error as 554 5.7.1 <dummy@gmail.com>: Relay access denied my postconf -n shows belog information ...
0
votes
0answers
28 views

Mail server in the middle responsible for translating from one domain to another

The title is a little confusing. We have an internal mail server that can be used to send mail. This internal mail server is only accessible from within our firewall unless we use the mail server's ...
2
votes
1answer
426 views

Cannot send email from EC2 instance on port 587

I have written a mail service for our flask application that uses Celery and RabbitMQ to send emails (using gmail). I have got the celery consumer and producer communicating okay but I cannot get to ...
0
votes
1answer
69 views

PTR record not valid for all domains

We have an issue sending emails to certain domains, namely Time Warner and Cox. Last week, we decommissioned our Exchange 2003 server and now our Exchange 2010 server is doing all of the transport for ...
-1
votes
2answers
121 views

How is incoming SMTP mail being delivered despite blocked port

I setup a MX mail server, everything works despite port 25 being blocked, I'm stumped as to why I am able to receive email with this setup, and what the consequences might be if I leave it this way. ...
0
votes
1answer
112 views

Postfix: mail going to spam [duplicate]

All emails I send from my new server go to spam in Gmail (and sometimes yahoo). I've never before sent out mass email or spam. What I've already done: Configured reverse DNS Enabled DKIM Verified ...
0
votes
0answers
60 views

can't send with postfix but I can whith one user

I have a postfix and dovecot server but when i try to send an email i get an time -out. Im trying to send with the email pinda@treadity.com. A telnet session isn't helping much ether. I get a blank ...
0
votes
0answers
19 views

email redirection service with reply path through local server

We need to keep a copy of all email conversations on our servers for regulatory compliance. We have contractors that (understandably) want to use their own email accounts We would like to setup a ...
1
vote
1answer
291 views

Can't connect to smtp (postfix, dovecot) after making a change and trying to change it back

I am using postfix and dovecot along with zpanel and I tried enabling SSL and then turned it off as I did not have SSL configured yet and I realized it was a bit stupid at the time. I am using CentOS ...
2
votes
1answer
31 views

Translating return receipts and postmaster messages

I was wondering if it is possible to translate postmaster message (return receipts, notifications, etc), or at least customize them. I ask this because my users (too) often call me in order to know ...
1
vote
2answers
58 views

Email verification with SMTP fails on local machine for certain domains

I want to verify whether mail box exists for a email with SMTP. I am able to do following things : Get MX records from domain Connect to host via SMTP Then I execute following commands : HELO ...
-1
votes
1answer
133 views

Can't connect mercury mail smtp server outside local network

I'm using Windows Server 2008 R2, and Xampp with mercury mail. My problem is that I can't send mails via my server outside the server network. My SMTP server is using port 25, which is open and ...
1
vote
1answer
39 views

What allows a mail server to operate faster or handle more mail? [closed]

I realize that this may be better suited for StackOverflow.com instead, however as I'm not much of a developer, I worry those answers may be way too developer-centric. Although, I would like some ...
0
votes
2answers
205 views

Can I send email unauthenticated to an internal SMTP server which then relays onto authenticated SMTP?

I have a back-end system which only supports sending email to an *UN*authenticated SMTP server, however, ultimately it needs to go via an authenticated SMTP server on the public internet. My idea was ...