How Do You Troubleshoot an Email when the Sender’s Spam Score May Be Bad or Good?

Problem scenario
The email sender may have a low spam score. What should you do to troubleshoot it?

Solution
Do other people get the sender’s emails? If so, has it ever worked? If not, check the destination email address. Can the destination email address send an email to the first sender with the problem? You could then reply. Maybe you accidentally typed in the wrong email address.

How Can You Find out if an FQDN, IP Address or Email Address are those of a Spammer?

Problem scenario
You are not sure if an email address is associated with spam. Someone make comments on your blog. You are not sure if they are legitimate comments or if it is someone trying to spam a website or create a message that is an advertisement. What should you do to check-in on the email address?

Solution
Try https://cleantalk.org/blacklists/

On cleantalk.org you can search for IP addresses,

Should You Notify the Sender of Receiving an Unintended Email?

Problem scenario
You received an email that you should not have. The footer requests you let the sender know and delete the copy you received. What should you do?

Solution
We think you should not examine the contents closely, delete the email and let the sender know. There may be a disclaimer boilerplate in the email that may or may not have legal weight.

Is It a Recommended/Best Practice to Use Email as a Component in Two Factor Authentication?

Problem scenario
You want to implement a secure protocol for authentication. You want there to be a password and a second factor of authentication. Can an email (being in possession of an inbox) be a factor in MFA?

Answer
Maybe.

No, according to NIST: https://pages.nist.gov/800-63-FAQ/
But many companies do use email as a factor in multi-factor authentication.

Is It a Recommended/Best Practice to Use Email as a Component in Two Factor Authentication?

Problem scenario
You want to implement a secure protocol for authentication. You want there to be a password and a second factor of authentication. Can an email (being in possession of an inbox) be a factor in MFA?

Answer
Maybe.

No, according to NIST:
https://pages.nist.gov/800-63-FAQ/

But many companies do use email as a factor in multi-factor authentication.

What Do You Do when You Cannot Send an Email due To “Error when communicating with server”?

Problem scenario
You have a web-based email account, and you cannot send an email. You cannot save a draft of the email. You get “Error when communicating with server” in red. What should you do?

Solution
Delete the images/graphics of the original email or in your message. This usually happens when the sender had graphic intensive content, and you are trying to respond.

How Do You Configure Thunderbird on Linux to Work with Web-Based Email?

Problem scenario
You want to configure Thunderbird to work with a web-based email account. What do you do?

Solution
Prerequisite

This assumes Thunderbird has already been installed. With CentOS/RHEL/Fedora, run this from the command line: sudo yum -y install thunderbird

With Debian/Ubuntu/Mint distributions of Linux with a GUI desktop, Thunderbird is usually already installed.

Procedures

  1. Launch Thunderbird.

How Do You Eliminate Old Email Settings in Mozilla Thunderbird on Windows?

Problem scenario
You keep opening Mozilla Thunderbird in Windows, and it keeps finding the old settings. You want a fresh installation. What should you do?

Solution
Overview: Totally remove Thunderbird and reinstall it.

Procedure

  1. Close Thunderbird
  2. Install CCleaner. It can be downloaded from here: https://www.ccleaner.com/ccleaner/download. (The free version will work.)
  3. Open it.

How Do You Import a .mbox into Thunderbird to View the Emails?

Problem scenario
You want to view the emails in a .mbox file. You are using Thunderbird. What do you do?

Solution
Overview: Install the ImportExportTools NG add-on. Have another email account (an empty one or something else) that can accept the emails in Thunderbird configured.

Procedures

  1. Open Thunderbird
  2. Click the hamburger symbol (of three horizonal bars in the upper right hand corner)
  3. Go to “Add-ons”
  4. Search for “ImportExportTools”
  5. Click the hamburger symbol (of three horizonal bars in the upper right hand corner)
  6. A mailbox,