The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.

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94 views

Email from a single external user isn't received by a single internal user in our domain

We have internal users with @companyx.co.nz email addresses on the domain. We have an external company who use @externalcompany.co.nz. A single user on our domain (sam@companyx.co.nz) can't seem to ...
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1answer
34 views

Email attachments not appearing under very odd circumstances

One of my employees is having trouble sending mail with attachments to an external party. We're using Outlook 2010 in conjunction with Exchange 2010 Standard. Here's what I've deduced so far: ...
0
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1answer
127 views

Weird CBL blacklisting (cutwail spambot ?!)

I have a weird problem and I wonder if anyone can help me as I really don't know what else to do. I'm administering a Linux server (Fedora 17), for a SMB company (~100 LAN computers). This server ...
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1answer
81 views

Exim ACL to limit sender to send mail only to localdomain

I'm currently using exim, and i need to limit a mail address to send mails only to local domain and deny mail to outgoing domains. I think it could be like this : deny local_parts = ...
-1
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1answer
91 views

Recipient address rejected: User unknown in relay recipient table; [closed]

We do not get mails from a specific provider. Their administrator send me this error message. Is it mean the problem is on our side? I'am not friendly with Exchange, how I can fix it, if I can? Jan ...
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1answer
23 views

I need to set up mail forwarding on debian server

I have a new Debian squeeze VPS with which I'm using to serve a couple of web sites. I have an email address me@mydomain.com that I would like to redirect to me@gmail.com. Can I install some script ...
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1answer
40 views

How can Sendmail reject email to a local user *unless* it comes from a trusted subnet?

I have sendmail set up to accept mail for a few domains and to relay messages for a few subnets' worth of systems. Recently a particular internal-use-only address has been receiving a lot of spam. ...
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3answers
83 views

How is DNS resolved for email addresses?

If I send an e-mail to gus@example.com, how does my e-mail client find out what IP address to send the e-mail to? I understand it would do a DNS lookup for example.com, but I want to know what ...
1
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1answer
66 views

How do I generate a certificate for multiple mail addresses?

At my company, we have short mail addresses for convenience, but they collide now that the company gets bigger. For new employees, we only make new longer mail addresses to avoid this. However, to ...
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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. ...
2
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3answers
328 views

no signing table match in opendkim

I have opendkim installed on centos. I am using postfix as MTA and dovecot for imap/pop... Now the problem is am trying to setup dkim for my domian. The mails are send from a sub domain ...
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2answers
38 views

Confusion about rDNS

I am slightly confused as to what has to go in the rDNS settings of my IP. Consider the following scenario: IP: 1.2.3.4 Domain 1: foo1.bar @ A 1.2.3.4 @ MX mail.foo1.bar www CNAME ...
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1answer
20 views

Will mail service affect? If I change hosting provider

I have registered my site with one service provider and I am using another service provider for hosting (by the way of changing name server), I configured and using many emails from existing hosting ...
0
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1answer
34 views

Preventing or Limiting Spammers/Bad Guys from Using My Domain

I started getting replies in my catch all email box that spam and viruses has been sent from my domain. Someone is spoofing my email addresses to send out spam and malware. I was wondering if anything ...
1
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1answer
44 views

Restoring an email message sent in 2012/2013 that can not be found in users mailbox

Novice here. Have had a request to restore a sent message that can not be located in the users Sent Items folder, probably because the message is 1+ years old. Running SBS 2008, Exchange 2007 and ...
2
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1answer
36 views

When creating DomainKeys does it matter if I use o=~ or o=-?

I used this utility to create my DKIM key (1024 bit size), since Gmail has been blocking us (we had an old joomla install exploited, was around before me). And I got this back: Your Selector Record: ...
1
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1answer
64 views

working mail system (real users) switch to virtual users Postfix+Dovecot+Roundcube Debian Wheezy

I have a working configuration on a Debian Wheezy VPS of: postfix 2.9.6 dovecot 2.1.7 (imap and pop3 but only use imap) roundcube 0.9.5 This is using real mailboxes (i.e. my linux ...
1
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1answer
34 views

Fasthosts and Heroku

I have an app on Heroku, for which I have pointed a Cname record to both the www and naked domain. However this is creating a problem when people try to reply to our emails from that domain. They ...
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0answers
20 views

Google Apps route AND bounce back

We have a catchall address set up and I was asked if we can, on request, look through it for for misaddressed email, for example going to mark@example.com instead of mark.hewitt@example.com ... That's ...
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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
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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 ...
1
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1answer
64 views

Getting error 421 4.3.2 All server ports are busy

I am running postfix on debian wheezy with Dovecot and I had spam issues with a php script . after finding and removing the script I am unable to send any mails from squirrel mail from my browser. I ...
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1answer
28 views

Forward wildcard e-mail address to a single e-mail address?

I am running a .com domain, like www.mydomain.com. I have the support address at support@mydomain.com, but my clients usually send e-mails to the support staff emails (e.g. johndoe@mydomain.com) and ...
1
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3answers
130 views

3 Exchange Mailboxes with 50GB and growing. Searching/Indexing is slow. Options?

We have a special customer that needs e-mails like we need water. There's 3 users, whose mailbox was about 50GB (last November) and it's still growing. It has a Windows Server with 24GB and MS ...
2
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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 ...
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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: ...
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3answers
44 views

Can I use MX Record Configuration to send one account's email to one server and a second account's email to a different server? [closed]

For example, let's say my MX Record(s) specify: 0 server1 mydomainexample.com 1 server2 mydomainexample.com Now let's say: me@mydomainexample.com is an account on server1 and ...
2
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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 ...
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1answer
49 views

Setting up server for Google Apps? [closed]

So I am currently running CentOS 6 and trying to figure out how to get Google Apps (gmail) to work. I am completely new to mail server software but have a general idea of how it works. What software ...
0
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1answer
130 views

Make Exim deliver local mail externally

We've got an unusual mail setup - Google Apps/Gmail in front, with Exim running on our webserver. Mail for any account that doesn't exist in Google Apps is forwarded to Exim. Both of these use the ...
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0answers
53 views

Postfix: Can I block mail from a specific sender if sent to a particular recipient?

AOA, I have been trying this post http://www.arschkrebs.de/postfix/postfix_restriction_classes.shtml to the word since ages without any luck. We are using Postfix as part of iRedmail. Any hint where ...
4
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1answer
128 views

Is it OK to have multiple TXT records for a single domain containing different SPF entries?

A remote recipient domain is rejecting mail on the grounds of SPF and I think it's because the sender has SPF configured incorrectly. When I run dig, I see: [fooadm@box ~]# dig @8.8.8.8 -t TXT ...
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2answers
351 views

Postfix server block outgoing fake domain permit only one domain

We are having postfix mail server in centos webserver. In that server users able to send from fake email id like admin@gmail.com and all. But I am having only one domain in that server, So I need to ...
2
votes
2answers
98 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 ...
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1answer
62 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 ...
1
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2answers
117 views

When does Postfix use IPv6 and when IPv4?

I've configured my mail server for IPv6 and IPv4 but in the most cases it uses IPv4 while IPv6 is available on the remote host. I use Postfix in version 2.9. So my thought was that postfix uses IPv6 ...
1
vote
1answer
38 views

Postfix not recieving mail from actual email but does from sendmail?

Ok so I'm trying to forward mail from my ubuntu server (lets call it example.com) to a external gmail account using postfix. The problem is when I send mail using another gmail and yahoo account to ...
0
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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
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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
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1answer
62 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
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1answer
38 views

Mail client with support for gssapi

I have configured Postfix and Cyrus Imap to enable SSO using Kerberos and GSSAPI. I use Thunderbird as a mail client which supports GSSAPI but I wanted to try some other client also. I tried ...
0
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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 ...
0
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1answer
82 views

Sendmail server keeps relaying mail to wrong server

Email to my organization (mycompany.com) goes through 2 sendmail servers running on CentOs 5.6, mail01 and mail02. I've configured a new sendmail server, mail03, in a different site for DR purposes, ...
3
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1answer
285 views

Office 365 routing of internal domain messages

Our office uses both office 365 and Google apps. We were on Google apps first, and decided to give office 365 a try. Some folks liked it, some did not, and want to revert back to Google apps for mail. ...
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1answer
141 views

How to let Zimbra accept incoming mail only from some MXes and authenticated users?

I have a working Zimbra 8.0.6 OSE that is currently accepting mail from the outside to any of its locally defined domains and will also relay every mail from authenticated SMTP users. There are ...
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2answers
63 views

Stop Postfix sending mail from localhost

When my mailserver sends mail here are the headers: Received: from example.com (localhost [127.0.0.1]) by example.com (Postfix) with ESMTP id EB14D48159 for <oli@myemaildomain.com>; ...
1
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1answer
24 views

How does the “Certificate Approver Email” fit on the ssl-certificate workflow?

How does the "Certificate Approver Email", required upon certificate generation, fit in the certification process as a whole ? More specifically: Is it important only for certificate generation ? ...
0
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1answer
29 views

How to provide a “Certificate Approver Email”, for a domain not supposed to process incoming emails?

I am in the process of requiring the generation of a certificate on RapidSSL, for the domain foobar.com which hosts my web application. I've been requested to provide a "Certificate Approver Email" ...
2
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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 ...
0
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1answer
142 views

Emails going to Gmail's spam, DKIM and SPF are both set up correctly

I've spent at least a day trying to figure out what is wrong with this and I'm losing my mind. I set up iRedMail on a VPS for personal email. Everything seems to work (emails can be sent/received), ...