DMARC, SPF and DKIM
Phishing and email spam are the biggest opportunities for hackers to enter the network. If a single user clicks on some malicious email attachment, it can compromise an entire enterprise with ransomware, cryptojacking scripts, data leakages or privilege escalation exploits.
What isn’t as well known is why most enterprises need all three of these protocols to protect their email infrastructures. Like much in the IT world, the multiple solutions don’t all necessarily overlap. Actually, they are quite complementary to each other, and chances are good that the average business will need all three of them.
Email Continuity
Email Continuity is a backup email system that allows you to continue receiving and sending emails using your normal email address even when your primary mail system is inaccessible.
Our back-up email service provides access to three (3) additional enterprise email server clusters for complete email redundancy.
If your mail server cannot be reached, then your email is sent to our Enterprise Back-up email servers. Once it reaches our servers, it remains in queue and we continually reattempt delivery of the mail to your primary mail server. When your primary server is back online, the queued mail is instantly delivered to your mail server. Our servers will keep attempting to deliver mail to your server for 14 days or until it responds.
How It Works
When an email is sent to a recipient the email server looks to see which server handles mail for the domain using the DNS MX records. MX records specify which server(s) will receive mail for a given domain. Each MX record is given a priority (the MX level), the lowest number being the primary mail server. The primary mail server is responsible for delivering the mail to the appropriate user mailbox.
Mail delivery is first attempted to the primary mail server (indicated by the MX record with the lowest MX priority number). If that server is not reachable, then delivery is attempted to the mail server with the second lowest MX priority number. If the second lowest mail server in priority is unreachable, then the mail will be delivered to the server with the third lowest MX priority, etc
Pricing
$12.95 per domain / year
Quotas & Limitations
Each Domain is allowed 1 GB of email or 100,000 messages in queue. 3GB, 5GB, and 10GB options are also available for an additional fee. Each domain is allowed to transfer 10 GB of email per month.
- There is also a daily limit of 100,000 incoming connections per day. We can not be used to defend a dictionary / directory harvest attack.
Includes
Emergency Email Spooling 10,000 Messages Per Day Queued 1000 MB per Day Service for 1 Domain 24/7 Web Support Included Incoming Email
- 1000 MB Max Queued
Disclaimer
Our back-up email service is not an anti-spam service. However, we do perform simple email checking to help prevent spammers from using our emails servers as an open relay to your mail servers.
Verify the server sending the email has correct reverse DNS configured.
Check to make sure the “from” mail address is valid.
Check to make sure the email headers are properly formatted.
Utilize Greylisting*
Utilize the Spamhaus RBL as well as an internal RBL
* Greylisting is a simple method of defending electronic mail users against e-mail spam. It is the best way of blocking most spam without using content filters, which can cause false positives. In short, a mail transfer agent that uses greylisting will “temporarily reject” (a 450 error code) any email from a sender it does not recognize. If the mail is legitimate, the originating server will try again to send it later usually within a few minutes, at which time the destination will accept it. If the mail is from a spammer, it will not be retried so the spam will not be relayed through our systems and on to your mail server.
Email Forwarding
Mail Server Forwarding is used to forward all incoming email for a domain to a destination email server on a specified port.
The destination mail server (an MTA, mail transfer agent), must have the ability to accept email for that domain. Our DNS enterprise email servers will route the incoming email for that domain forward to the destination email server. This service is extremely popular for people that want to accept mail on a port other than port 25. Mail Server Forwarding service also includes Email Continuity Service.
Quotas & Limitation
Each domain is allowed up to 1 GB or 100,000 messages in queue.
- Each domain is allowed to transfer 10 GB of email per month.
- Includes
Forward Email Server to Server Use Non-standard Ports 1000 MB per Day Service for 1 Domain 24/7 Web Support Included Incoming Email 1000 MB Max Queued
