Questions tagged [email]
The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.
492
questions
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GMail bouncing mail sent over IPv6, IPv4 working
I have trouble sending email to GMail addresses using IPv6 from my domain camgirltools.net
If IPv4 is used, everything works as intended, the mail is delivered. When using IPv6 to send mail to GMail (...
- 282
11
votes
2
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2k
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crontab sends month-old emails
ubuntu 14.04
Mailserver: Postfix
root receives dozen of emails from crontab. These mails contain PHP warnings.
I've fixed the cause for these warnings.
I've fixed every cronjobs to not send emails (...
- 658
11
votes
3
answers
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MAILTO is not working for CRON. How can I fix this?
I have setup cronjob for the root user.
However when the cron fail I should receive an email from the cronjob because I have set MAILTO like this in /etc/crontab :
[email protected]
I have ...
- 1,331
11
votes
2
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Setting up DomainKeys
I've tried improving the security of my emails (and preventing them from being marked as spam) by adding the SPF and DKIM records. So I've created both of them and I tested the results with check-auth@...
- 275
11
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2
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invoke filtering manually in dovecot+sieve
I've configured dovecot with a sieve filtering (also I've configured roundcube, but this does not matter I think).
It's working fine, I've set up some filters. But now I've got a huge unfiltered ...
- 237
11
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1
answer
25k
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How to determine which user sent a specific email with postfix?
We have a postfix server that requires authentication to SMTP relay through it. We use virtual mailboxes in MySQL database.
A message was relayed through our system, and we need to determine which ...
- 4,656
11
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3
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how to disable remote wipe for Exchange 2010 ActiveSync?
When connecting android mobile devices to Exchange ActiveSync some require granting device administrator privileges which permit an exchange administrator to remotely wipe the phone. The warning ...
- 597
11
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2
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6k
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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 ...
- 111
10
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1
answer
2k
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Trying to setup mail server, can't get ports (25, 587) to work
I've searched everywhere and I'm really struggling with this one. I think I've tried just about everything.
Background info
VPS with CentOS 6.7
Postfix 2.6.6
dovecot, amavis, mysql, fail2ban
I've ...
- 103
10
votes
1
answer
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How do I audit user's mailbox actions performed via IMAP in Exchange 2010?
I read through the Technet article on Mailbox auditing but it seems to only be working for MAPI access.
I perform the following cmdlet to enable auditing of the owner:
> Set-Mailbox -Identity "Mr....
- 10.9k
10
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8
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Backup Solutions for Exchange 2007
What Backup solutions do people use for Exchange 2007? In particular i'm interested in those that allow a mailbox level backup, so that individual mailboxes can be restored.
- 39k
10
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3
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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.
[email protected]
55 23 * * * /usr/bin/...
- 558
10
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2
answers
11k
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How can I route some emails to a script in Postfix?
How do I route all emails directed to user-*@example.com (i.e. [email protected]) to a pipe command in Postfix? The idea is to create craigslist-style anonymization by assigning dynamic email ...
- 203
9
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3
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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:
...
- 569
9
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3
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554 - Sending MTA’s poor reputation
I am running an email server on 77.245.64.44 and have recently started to have problems with remote delivery of emails sent using this server. Only about 5% of recipients are rejecting the emails, but ...
Phil Wilks
9
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7
answers
9k
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Simple Mail System for Ubuntu?
What I'm looking for should be relatively easy. All I want to do is setup something VERY small for Ubuntu that will allow me to use the mail() function in PHP from my web server (/var/www/). I don't ...
- 235
9
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5
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3k
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MX records, better setup for load balancing and failover
Take domain example.com, it has two mail servers mail1.example.com and mail2.example.com, both already configured, usually I would go with the following setup:
example.com. 1200 IN ...
- 93
8
votes
1
answer
38k
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450 4.7.1 Client host rejected: cannot find your hostname
I have a Postfix/Dovecot email server which fails to deliver emails to some addresses. Here's an example of what is says:
<[email protected]>: host mail.da.net.ua[91.213.154.4] said: 450
4.7.1 ...
- 277
8
votes
1
answer
14k
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how can i disable outbound mail in postfix?
i want to be able to send mail to someuser@localhost but not allow any mail to go out to the outside world from anyone to anyone. i've seen multiple entries about how to filter or restrict outgoing ...
- 83
8
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2
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2k
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DMARC test failed but we didn't find any obvious reason why; DMARC not passing while SPF and DKIM do
About 7 days ago, I found out on https://www.mail-tester.com that sometimes (50% of my tries over a couple of days) my company email does not pass DMARC test. As it states it does not know why, I am ...
- 499
8
votes
1
answer
5k
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Amazon SES e-mails ending in Yahoo & Hotmail Spam folders, even though SPF and SenderID and DKIM are set correctly
This is incredibly frustrating. My Amazon SES e-mails are ending in Yahoo & Hotmail Spam folders, even though my SPF, SenderID, and DKIM are setup correctly. Since this particular site requires ...
- 449
8
votes
5
answers
19k
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Reject incoming emails that use your own domain as sender
It would be nice to reject incoming emails which use one of my virtual domains as sender address while not being a legitimate user of mine.
I know that I can reject incoming emails which use an ...
- 4,253
8
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2
answers
16k
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How to Remove UNCHECKED Term Attached in Email Subject Area When Received
How do I turn off "UNCHECKED contents in mail FROM" mails sent by Amavis to the postmaster of the domain every time a user sends an encrypted mail. The setup is a Debian 7 with postfix and amavisd.
- 397
8
votes
4
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6k
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SMTP message rate control on Ubuntu 8.04, preferably with postfix
Maybe I am chasing a bug but I am trying to set up a smtp proxy of sorts. I have a postfix server which receives all the email for a collection of servers/clients. It them uses a smarthost (relayhost=....
- 171
8
votes
1
answer
12k
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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 ...
- 125
8
votes
1
answer
32k
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How to configure sendmail to send email via GMail (smtp.gmail.com), using port 465 or 587?
I have configures sendmail to send email via my GMail (Google Mail) account, i.e. via smtp.gmail.com, by editing /etc/mail/sendmail.mc and regenerating sendmail.cf:
-dnl define(`SMART_HOST',`smtp....
- 182
8
votes
1
answer
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Couldn't drop privileges: User is missing UID (see mail_uid setting)
I'm hoping I can use some help.
I'm configuring dovecot_ldap, but I can't seem to be able to get dovecot to authenticate the ldap user.
Below is my config and log info:
hosts = 192.168.128.45:3268
...
- 191
7
votes
5
answers
6k
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Getting stats about deliverability from postfix
At work, our CEO is working on a plan to move away from a service provider who do our Spam filtering, etc.
Currently, all our mail gets relayed out through this service, and all incoming email gets ...
- 457
7
votes
4
answers
11k
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SMTP relay through GMail overrides "from:" address with "[me]@gmail.com"
I've been trying to figure out if this is a new "feature" or if there is an issue with my configuration. I'm using Ubuntu 10.04 Desktop with Postfix as MTA. My smtp (as opposed to smtpd) ...
7
votes
5
answers
10k
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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 ...
Brian
7
votes
1
answer
8k
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Does postfix reject spoofed senders?
Is there a reliable way to reject incoming mails with a spoofed e-mail address?
What kind of checks does postfix run normally on incoming mails?
does postfix check the reverse dns by default?
does ...
- 683
7
votes
7
answers
7k
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Email notification about each SSH connection to Linux server
I would like to be notified about each SSH connection to the Linux (Debian) server.
Already saw some methods, which proposed to add mail command into own .bashrc, but this approach seems not to cover ...
- 597
7
votes
3
answers
21k
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How to find out what program is sending emails
I have linux (debian) box which is running fine.
However I have problem I need to find out what program is sending emails when i use "mail" command. Or for that matter when a PHP script is sending ...
- 191
7
votes
2
answers
17k
views
Postfix unable to deliver to user's Maildir
Had a server that was using postfix/dovecot w/ CentOS 6.5/6.6, Every thing has been running well for the past few months, until the raid controller failed. So I installed a new server using CentOS 7....
- 205
7
votes
2
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1k
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How can I create and update the existing SPF record to allow more than 10 entries?
How can I include another SPF record if my existing domain already has 10 lines of SPF records in the TXT record?
I wanted to add these two:
include:mailgun.org
include:sendgrid.net
This is my ...
- 1,305
7
votes
5
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7k
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Email sent from server with rDNS & SPF being blocked by Hotmail
I have been unable to send email to users on hotmail or other Microsoft email servers for some time. Its been a major headache trying to find out why and how to fix the issue.
The emails being sent ...
- 361
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votes
1
answer
2k
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How can I use Postfix to track/log the HELO name that IPs are communicating to it with
I am using Postfix as an internal mail relay server, and we have several servers internally running all sorts of custom code, some are packages/services, and some of it is native Linux or Windows ...
- 183
7
votes
2
answers
9k
views
Refuse to send email to specific recipients with Postfix
So, right now I am halfway through trying to setup an outgoing-mail blacklist, by way of smtpd_recipient_restrictions.
The problem I am experiencing is that my test emails are being delivered when I ...
- 173
7
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3
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15k
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Can't send email from postfix to hotmail [closed]
I have problems sending emails from my server to hotmail.
I used mxtoolbox.com and reported no problems on records or blacklists.
Also, emails go successfully to gmail...
This is my mail.log on ...
- 183
7
votes
3
answers
29k
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How do I Forward root's email to an external email address?
I have a small server (Ubuntu 10.04) at my house and I would like to forward root's email to my gmail hosted domain to get security notifications and what not.
I ripped everything out and started ...
- 935
7
votes
2
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6k
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DMARC fail, but DKIM and SPF are passing
I am using AWS SES (in sandbox mode) to send an email to a GMail address.
Unfortunately it gets flagged as spam.
Google is nice enough to tell me in the message details that it is a DMARC failure
I ...
- 203
6
votes
1
answer
986
views
Should SPF records provided by ISPs contain "all" at the end?
This seems obvious or something I just don't understand.
I want to build SPF records for my clients. Most of the email providers provide an SPF record that I can "include" in mine, but they all ...
- 61
6
votes
1
answer
13k
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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 ...
- 297
6
votes
1
answer
24k
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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.
...
- 111
6
votes
7
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7k
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Receive email alerts from Linux file server
GOAL: Get a text file on my file server into my gmail inbox.
The file server is running Ubuntu Server 8.04 I currently SSH into it from time to time and to check logs, SMART stats for hard drives, ...
- 1,119
6
votes
1
answer
28k
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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 ...
- 205
6
votes
1
answer
9k
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Exchange 2010 Out of office doesn't show original senders email address
When one of our users is on holiday they will set their Out of office message and change the Out of office rule to forward all emails received to a colleague. This has always worked very well for us ...
- 12k
6
votes
3
answers
14k
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Postfix sends to FQDN Hostname instead of Domain Name
I have installed a send only postfix. Postfix works when I send a mail to a full email address. However, if a mail to sent to a user, it adds the FQDN name as the extension instead of just the domain ...
- 1,471
6
votes
1
answer
11k
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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:
...
- 61
6
votes
1
answer
3k
views
Why is SPF being validated against my mail server's IP instead of sender's IP?
I have a mail server "example.com" which forwards all emails with recipient "[email protected]" to "[email protected]". My mail server runs Postfix and it uses the virtual_alias_maps mechanism to perform the ...
- 2,262