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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.

6676 questions
17
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8 answers

Are email disclaimers valid or worthwhile?

My organization automatically attaches an email signature for all employees' outgoing messages. The signature contains onerous warnings and disclaimers that sound very official and imply all kinds of legal standing. Is there any point to this? It…
jldugger
  • 14,462
16
votes
2 answers

Hotmail marking messages as junk

I was having problems with emails sent from my server being blocked completely by Hotmail, but I found out Hotmail had blocked my IP and by contacting Hotmail I had the block removed. See this question for more info: Email sent from server with rDNS…
Canadaka
  • 361
16
votes
7 answers

My email server is being blocked by Yahoo: TS03 Message permanently deferred

My mail server has been getting the following error from Yahoo's mail servers since about a month: postfix/smtp[23791]: host g.mx.mail.yahoo.com[98.137.54.238] refused to talk to me: 421 4.7.1 [TS03] All messages from [my ip] will be permanently…
liviucmg
  • 283
15
votes
3 answers

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
  • 899
13
votes
3 answers

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
  • 257
10
votes
2 answers

Is port 25 used between mail servers secured with SSL/TLS?

Does port 25(smtp) used by MTAs work under plain text/non-encrytion ? I couldn't find any resources that state smtp with 25 by default is plain text. From Opportunistic_TLS (See the code section S: ...) , it…
Rick
  • 339
8
votes
9 answers

What standards should be used for email address names?

This may be to much of a subjective question, but I'm not sure. I'm setting up email for a new business, with a new domain, and a new email server (google apps). Are there any recommended standards for email that are widely followed? At my day job…
Max Schmeling
  • 859
8
votes
4 answers

Can an e-mail's headers tell you if it has an attachment?

I'm trying to filter emails that have attachments, but in the system I'm using I only have access to the headers (for filtering). Is there a consistent way of determining if an e-mail contains attachments using only headers? (Perhaps checking if the…
iainbeeston
  • 203
8
votes
1 answer

How can I configure Horde under cPanel to display HTML emails?

In cPanel, Horde does not display rich text/HTML emails by default, it only displays the plain text version. I know there is an option to display HTML emails, but I am not sure how to enable that under cPanel. I read a lot of forum posts online…
Josh
  • 9,218
7
votes
4 answers

Why do email headers contain private IP addresses?

Some email have a header like "Received: from [172.16.1.2] (some.public.ip.address)" Why is that? why does the sender's client of someone behind NAT reveal the private address?
White_Rabbit
  • 73
7
votes
4 answers

Send an email on reboot

Possible Duplicate: Centos - Automatically issue a command after rebooting I'd like to configure a server (Ubuntu) to send me an email whenever it reboots. What would be the best way to do this?
Alf Eaton
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6
votes
3 answers

How to avoid automatic responses from putting our mail server in a loop?

I have a mail server X which acts as a middle man between the customers (A) of our feedback applet, created to be used in their websites, and customers (B) of our customers. So, whenever B sends an email to A, it goes via X, where we decorate the…
Vidur
6
votes
3 answers

How do I Increase the log level of Fetchmail?

How do I Increase the log level of Fetchmail? This seems stupidly easy but I can't find the directive and file I need anywhere on-line.
Nick
  • 4,656
6
votes
0 answers

Is 8bit Content-Transfer-Encoding Considered RFC 5322 Compliant?

What I'm trying to ascertain is whether or not emails containing 8-bit characters (in the range %x80-%xFF) - which could appear in messages or sections with a Content-Transfer-Encoding header of 8bit or binary - can ever be considered RFC…
user1974458
  • 61
5
votes
2 answers

Does return-path or reply-to affect email deliverability?

I want to send an email that looks like: Sender: user@A.com From: xyz@B.com Reply-To: aaa@C.com Return-Path: aaa@C.com A.com is owned by me, and B.com and C.com are owned by a client. I am mostly concerned that email clients will flag this email as…
user156130
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