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

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1answer
3k views

Outlook 2010 exchange setup prompts for username@domain.local rather than email@domain.com

We use a hosted exchange service. When users want to set up Outlook 2010 to access their account, they open Outlook and run through the configuration steps. Autodiscover is enabled, and in the user'...
3
votes
1answer
346 views

2 separate postfix instances and confusion with IP's in received field of mail message

i have a problem with my 2 postfix instances. 2 separate IP's and coressponding domain names are setup on networking, they are working fine. I want second mail message (below) to have Received: from ...
3
votes
2answers
2k views

Sendmail Configuration to not deliver mail to local machine

I have sendmail up and running on an Ubuntu 8.04 machine. It can send mail correctly to all but the domain to which it is a part. How do I configure it to not send to itself for email addresses on ...
3
votes
2answers
5k 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 ...
3
votes
9answers
7k views

Reducing the Exchange 2003 database size

Our company is running Exchange 2003 on Server 2003. Our primary exchange store file (priv1.edb) keeps growing and is now at over 45GB. If I add up the size of the mailboxes in that store I get less ...
3
votes
2answers
2k views

postfix - different header checks for incoming and outgoing mail

How can I apply different header_checks for incoming and outoing mail using postfix? By default, all header_checks are applied to both incoming and outgoing.
3
votes
1answer
8k views

Postfix : Relaying all incoming mail to another host

I have two hosts. One is mail1.example.com and the other is mail2.example.com. Each server has its own public IPv4 address, but they are in different geographical locations. Domain name has mail1 ...
3
votes
4answers
6k views

Create Exchange 2003 server side rule without logging in as user

I need to set up server side rules (auto-replies for users who have left etc), and having to login as each user and open Outlook is a serious PITA. Also any time that I have to create any rules for ...
2
votes
2answers
4k views

Forward Mails to Gmail

I have a postfix mailserver running. Mails sent from users to Gmail are showing up in Gmail, so it works in general. Same for all other freemail hosts I know. The problem is that some users have no ...
2
votes
3answers
1k views

Bulk email advice

I need to send email campaigns for my site. There are services like mailchimp but I want to send my own. Do you know any good VPS providers for sending bulk emails?. What are the issues (such as ...
2
votes
3answers
3k views

What is a good sendmail log analyzer?

We had a recent event where one of two servers running sendmail stopped sending mail, and built up a 7000 message queue before we noticed / fixed it. It's fixed now, but we don't know why it failed, ...
2
votes
1answer
5k views

Postfix unable to create lock file, permission denied

I thought I had my postfix configuration all set up on my Amazon Ubuntu server but I guess not. I'm trying to set up an admin email account for 3 virtually hosted Apache websites. Here's my postfix ...
2
votes
2answers
6k views

Postfix auto create Maildir

I've been beating my head against a wall for a while now on this one. Basically, here is the rundown: Our MX record points to a frontend SMTP server, which contains aliases for actually routing the ...
2
votes
6answers
7k views

Cannot send email to Hotmail or MSN addresses [duplicate]

I am running into a problem at work where end users are unable to email Hotmail or MSN email addresses. We are running an Exchange 2007 server and the message itself is in HTML and contains no ...
2
votes
4answers
280 views

Does sending e-mail in the name of customers increase the risk of being marked as spammer?

We are developing a SaaS website application that lets users send invoices to their clients. Ideally, these e-mails should appear to be originating from our customers, so the sender e-mail address ...
2
votes
1answer
3k views

Mailman cannot relay e-mails to non-local domains

My e-mail server runs Debian with postfix, dovecot, amavis, mailman, with postfixadmin in a virtual domain setup. All works fine, except for mailman which is not able to relay e-mails to non-local ...
2
votes
3answers
1k views

How can I route a SMTP message by FROM domain (not To, CC, or BCC)

I'm handling email for many different companies. Each company needs me to route all outbound email through a specific SMTP relay based on From address. What software configuration or technology ...
2
votes
1answer
3k views

Remove exim local username

How can i remove the local username in the mail headers with exim4 running on debian 6? Received: from root by host.domain.com with local (Exim 4.72) (envelope-from <reply@domain.com>) id ...
2
votes
1answer
17k views

What does “Mail Deferred:” mean in Linux Logwatch

I am just analyzing my logwatch logs, and I see the following entries: SMTP SESSION, MESSAGE, OR RECIPIENT ERRORS ------------------------------------------ Mail Rejected: Total: 6 Mail ...
2
votes
2answers
101 views

Possible to ensure that from address is not spoofed by mail server?

I want to know that is it possible that using postfix or any other MTA, i can apply a restriction that email sender cannot change/spoof his sender email, and email is only sent from the email ID, ...
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vote
4answers
7k views

Exchange 2007 - no inbound e-mail. Any ideas why?

We are running Exchange 2007 and have been doing so for a few years now with only occasional issues. This morning, however, we are not receiving any inbound (external) e-mail. Internally sent e-mail ...
1
vote
1answer
427 views

EXIM: Relay to Office 365

I'm trying to configure exim to relay mails via an Office 365 account. I can find quite a few examples of doing this via postfix but almost none on exim. Is this at all possible? The idea is to have ...
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vote
3answers
15k views

How do I set up SMTP on Windows Server 2003 to forward all emails to a given address?

I'm setting up an internal SMTP server to handle software tests which involve the sending of emails. I want to configure the server so that any emails sent to myinternaldoamin.com get relayed (is ...
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vote
3answers
289 views

Do MTAs always queue mails when they can't connect to dest MX server?

At our (small) office we're deciding whether to have our MX record point to our local Exchange server. I was a bit worried about downtime, so thought that I ought to set up a backup MX server. Then I ...
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2answers
2k views

E-Mail Bounce Management

we want to improve our mailing lists by handling all the bounces we get. As I saw there are different approaches. One checks the badmail folder in IIS mailroot folder. Others check a email account ...
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vote
1answer
2k views

Why sendmail is accepting mails for hostname not present in local-host-names file?

I have following line in my cf file Fw/etc/mail/local-host-names and following lines in local-host-names file mydomain.com hostname.mydomain.com but when I send mail to mailaddress@otherhost....
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3answers
547 views

Qmail Patching Makes me Nervous

We have a system running CentOS 5 with Plesk 8.6 and Qmail running. Our primary domain is hosted through Media Temple. When Plesk and Qmail are hosted on a single Dedicated Virtual server, it reads ...
0
votes
3answers
5k views

Hotmail wants me to modify my SPF record

This is my current SPF record. It works well with gmail and yahoo but hotmail was ignoring. So i used their submit system and now they replied me with the text below. This is my current spf v=spf1 a ...
0
votes
0answers
71 views

If my SES SMTP credentials are compromised can my SES API usage (using access key+secret) be affected

We want to setup our corporate SMTP server to use AWS SMTP, which uses credentials separate from the AWS Access key and secret. I am thinking that Amazon keeps these separate so that if someone is ...
0
votes
3answers
3k views

postfix: catch outgoing mail and redirect

I'm trying to configure my postfix so all mail that goes through that has tld dev would be redirected to a root user, here is my config files: [alexus@wcmisdlin02 postfix]$ tail -1 main.cf ...
0
votes
1answer
259 views

How to make qmail to feed email into shell command?

I have some server running qmail, with many users/domains configured via plesk. I would like to get emails from specified address delivered to one of my users being feed to shell command, as addition ...
0
votes
1answer
3k views

Error: Could not execute mail delivery program '/usr/sbin/sendmail'

Recently, my linux servers sendmail program stopped working and every time I send an email I get this error: Warning: mail() [function.mail]: Could not execute mail delivery program '/usr/sbin/...
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votes
3answers
2k views

Sending 10,000 emails?

(I don't know whether to submit this to SuperUser or StackOverflow.) My friend and I have a subscriber list -- strictly opt-in, for people interested when we release new projects -- and we may want ...
8
votes
3answers
3k views

Get cron to send html-formatted emails

I have a stats program which runs on log files via cron. The stats program can output HTML. Right now I rely on the MAIL_TO mechanism in the crontab. MAILTO=my@email.addr 55 23 * * * /usr/bin/...
6
votes
3answers
9k views

Postfix Relay to Office365

I am trying to setup a Postfix server on a Linux box to relay all mail to our Office365 (Exchange, hosted by Microsoft) mail server, but, I keep getting an error regarding the sending address: ...
5
votes
1answer
5k views

modify the recipient address of an email on the file in the postfix queue

I have a few emails in my mailq which are bounced for a good reason, the email address is wrong. I was wondering if it is possible to modify the address of the recipient on the fly. I can see the ...
5
votes
3answers
99 views

What to do if one doesn't want to receive email bounces?

Background—the standards RFC 5321 §4.5.5 states: All other types of messages (i.e., any message which is not required by a Standards-Track RFC to have a null reverse-path) SHOULD be sent with ...
5
votes
1answer
593 views

Postfix: selecting relay host based on From: mail header rather than envelope sender

I've successfully set Postfix to relay emails via Mandrill using SASL and sender_dependent_relayhost_maps with a MySQL table so that different senders connect to Mandrill using their own Mandrill ...
4
votes
5answers
3k views

Why are emails sent from my applications being marked as spam?

I have 2 web apps running on the same server. The first is www.nimikri.com and the other is www.hourjar.com. Both apps share the same IP address (75.127.100.175). My server is through a shared ...
4
votes
3answers
7k views

Send As Distribution Group Email Address?

We have a Small Business Server 2003, with a support distribution group. Is it possible to allow members of a distribution group, send emails from the group email address?
4
votes
1answer
2k views

Postfix with Dovecot: local and virtual users

I just finished setting up a Postfix SMTP and Dovecot IMAP/POP3 server. It works perfectly fine for virtual users both sending and receiving, but I need to do the following: Besides virtual users ...
4
votes
2answers
276 views

Running a mail forwarding service, what are some steps I should take to prevent my IPs being blacklisted

Background: I'm about to launch a service which offers email forwarding for a large number of domains. Say you want people to be able to contact you using you@somesite.com, all emails sent to that ...
4
votes
3answers
12k views

uuencoded mail attachments display as binary code

I have run into a attachment display issue at a client who has recently switched from Exchange 2003 to Exchange 2010. The issue was initially perceived as affecting only Mac OS X email clients (...
3
votes
1answer
8k views

Postfix Whitelist before recipient restrictions

Alright. Some background. We have an anti-spam cluster trucking about 2-3 million emails per day, blocking somewhere in the range of 99% of spam email from our end users. The underlying SMTP server ...
3
votes
1answer
3k views

How to reduce the Sendmail DNS timeout period

I have a problem with the sendmail DNS timeout period when trying to sent to a email address which has a DNS issue. Let's say the problematic email address is test@example.com I can see there is a ...
3
votes
8answers
3k views

Block spam by using geoip filter?

We are looking for a way to be able to block spam based on geographic location by filtering using geoip. context: we rarely have any email correspondence outside of the USA, so we would like to block ...
3
votes
5answers
490 views

Email Delivery To University Mail Servers (.edu emails)

I'm running an app at www.universitytutor.com which lets people find tutors. Most of the tutors are college students. We send out a follow up email 2 weeks after someone contacts a tutor to ask how ...
3
votes
1answer
345 views

Postfix/Dovecot - Multiple Domains and Multiple Linux Accounts

I have been trying to setup a new mail server to migrate from my VPS, as my host has decided to close its doors. The old server was running Exim/Courier (nearly a decade old at this point,) and I'm ...
3
votes
1answer
330 views

A record required for MX record?

Previously our domain, let's call it ourdomain.com, pointed to an IP address (our web host). In addition, we use Office 365 to handle our domain email accounts. DNS records: ourdomain.com A ...
3
votes
3answers
8k views

no signing table match in OpenDKIM

I have OpenDKIM installed on CentOS. I am using postfix as MTA and dovecot for IMAP/POP3. Now the problem is am trying to setup DKIM for my domain. The mails are send from a sub domain mail.example....