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Questions tagged [email]

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

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

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How to redirect all outgoing email from postfix to a single address for testing

I am setting up a testing server for a web based application that sends some email notifications. Sometimes testing is performed with real customer data, and for that reason I need to guarantee that the server is not able to send emails to our real…
0x6A75616E
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postfix: connect to Milter service inet:127.0.0.1:8891: Connection refused

I noticed that there is a error with milter if I type service postfix status : Jul 01 17:39:01 mail postfix/cleanup[13921]: warning: connect to Milter service inet:127.0.0.1:8891: Connection refused but what does that mean and how do I fix that? It…
Sarius
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DKIM: Can I use a RSA key larger than 2048bit, i.e. 4096?

I wonder if I can simply use a 4096bit RSA key for DKIM (in DNS TXT Record). Are there any downsides (neglecting computational effort)? Maybe there are mail servers which can't handle a key this large? Also: Is there any big mail provider which…
Florian Schneider
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How to resolve problems with spf / softfail?

I'm having problems with Google rejecting mail because of SPF problems. I thought I had this fixed, but evidently not... The mail is being sent from a Drupal site running mimemail. A message that shows the problem looks like: Delivered-To:…
Jim Miller
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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 if available and has a fallback to IPv4 or am I…
nazco
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Is there an email header that will avoid responses from most auto-responders?

I have a few scripts that automatically send out small email notifications when necessary. I get a small number of auto-response messages (e.g. out-of-office or vacation) back from these. Is there a header I can add to the email that will indicate…
Tony Meyer
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Benefits of using a subdomain for sending email?

Assume I own the domain name, example.org. I am creating a setup where I receive email sent to me@example.org using Google Apps. The MX records for example.org already point to Google's servers and it works great. Now, I have an application server…
Michael Brook
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What issues are there in using Gmail for a corporate email solution?

Some people will feel uncomfortable with having their company email outside their company network. How to allay such fears? What other issues are there in using Google for corporate email? What are the benefits?
cletus
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How can I make Amazon SES the default method of sending mail from my server?

I'd like to start using Amazon SES for all emails from our server. We have a few freelance designers with PHP hosting, some Django/Python web apps and also some system utilities which send emails. So I'd like to have PHP's mail function, the command…
Jake
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How do you monitor a monitoring server?

So we run Groundworks (with Nagios) on CentOS to monitor our various servers and processes. I have it setup to automatically send emails and SMS texts when things reach a WARNING or CRITICAL state. Normally this works perfectly. However, twice we've…
organicveggie
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My EC2 instance's email is being spam blocked by gmail

I'm not sure what to do about this. When on a different IP (the same server set up, domain etc), we had no problems with email deliverability. Since transferring to EC2, despite having the AWS imposed SMTP limits removed, I'm finding that my…
chrism2671
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Do you use postfix or qmail and why

I am setting up a server and I have the choice of installing qmail or postfix. Can someone help me make the right choice. Thing I like to see covered are: - Performance - Ease of setup - security
Saif Bechan
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E-mail lifecycle after it's been sent

I was testing my mail server's STARTTLS configuration when I stumbled onto this page : https://starttls.info/about. The following excerpt puzzles me: When you send an email through your outgoing mail server, that email will potentially do…
Executifs
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Sendmail: Sender address rejected (Domain not found)

I'm running into problems with sending mail on our webserver. Some mails are sent and delivered without any problems (eg Gmail), while others are deferred with "Sender address rejected: Domain not found" I understand that this is a spam protection…
JonoCoetzee
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Is there a way to filter mails in remote IMAP account?

Situation: mail server with IMAP only access. Problem: I want to be able to filter mails (put some mails to various folders, mark them as read and so on). Most new email clients have this ability, but I want a standalone filtering program, as I need…
user13185
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