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Posts Tagged ‘ip reputation’

Warming Up Your IP Addresses Automatically

Thursday, June 21st, 2018

When sending email messages, there are many best practices for ensuring optimal deliverability.   I.e., for getting your messages into your recipients’ Inboxes and for staying off black lists.  One very important factor in deliverability is “IP reputation.

Good reputation: If your server is known to send lots of good quality email (email that people do not consider spam-like), then your server’s address (its “IP Address”) is looked on favorably by ISPs (such as Yahoo!, Google, Microsoft, etc.) and you can send large quantities of good email and have it all delivered.  Your server has a good reputation and your server’s IP address is “warm” (think warmed up and humming a long).

Warming up an IP address

Bad reputation: If your server is a known source of junk or malicious email (according to the recipients of the email — it doesn’t matter what you think about the email quality), then you will have a hard time getting your email delivered and many ISPs will throttle your email, accepting only a few messages a time.  Your server has a poor reputation and work will need to be done to repair it.

No reputation: If you just got a new server, it may not have been sending any email for a while.  Or, if you have a server but it has been idle for a long time (e.g, months).  In either case, your server’s address may have “no reputation.”  ISPs are very skeptical about email from servers with no reputation or recent history of good email sending.  A typical sign of a spammer is when a server with little or no reputation suddenly starts sending large quantities of email.  ISPs will detect this and they tend to quickly throttle or block such servers…. moving them from “no reputation” towards “bad reputation”.

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Are Cloud Servers Bad for Sending Email?

Thursday, April 12th, 2018

Public cloud servers are great for many things; however, sending email is not one of them.

Why Cloud Servers are Bad for Sending Email?

The IP address spaces used by the major public cloud vendors (i.e. Amazon, Rackspace, etc.) for their cloud servers are well known and are generally black- or gray-listed by anti-spam systems. Additionally, many of the IP addresses in use by these systems are additionally “polluted” from previous abusive use by spammers.  When you set up a new cloud server, you could be easily assigned a “tarnished IP.”  Even if you do not inherit an exceptionally bad IP reputation from the previous user(s) of your new IP, your server will still be in the uncertain neighborhood of “public cloud IP addresses.”  This is the “wrong side of the tracks” and thus considered a possible spam source.

Cloud servers are bad for sending email

 

We have investigated several services that claim to offer “Cloud-Based Outbound Email” and have found that many use cloud servers for things like scanning email messages for spam and viruses, but use non-public cloud servers for the actual sending of email.  This is obviously not true for all companies, but it points to the fact that if everyone might be affected, the solution is to NOT send email directly from your public cloud.  There are, however, straight-forward solutions to getting email originating from such servers delivered.

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How do I fix the reputation of my IP address?

Tuesday, April 19th, 2016


It happens — you’re sending email messages without issue, and then suddenly they’re not being delivered, or they’re being tagged as spam.  A little digging reveals that the problem is that your “IP reputation” is now poor, and you need to fix it somehow.

This is our latest “Ask Erik” question, from Angelo Correa or Living Legacy, Inc.

How do I fix the reputation of my IP address?

What is IP Reputation?

Email service providers (e.g. AOL, Gmail, LuxSci) and email filtering systems (e.g. Barracuda, McAfee, Proofpoint, SenderScore) collaborate on and track the sending of unwanted email in order to reduce the blight of email spam that continues to plague the Internet.  Some of the significant factors that they track include:

  1. Quantity of email sent from your IP address
  2. The spam-like characteristics of these messages (based on spam filter analysis)
  3. The number of spam complaints by recipients of these messages
  4. The number of messages sent to invalid recipients or honey pots. Honey pots are email addresses that do not belong to real people and only exist as traps for senders who have acquired these email addresses via web site scraping or some other illegitimate manner.

Put together, these factors end up determining the reputation of that IP address with respect to the sending of email messages.  If the reputation becomes poor, then spam filters will start to quarantine or reject your messages, resulting in poor deliverability.

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8 Factors Governing your IP Reputation: Increasing Email Marketing Deliverability

Monday, January 12th, 2015

Getting your email marketing messages into your recipient’s INBOXes is key to a successful mailing campaign.  This is “deliverability.” One of the central factors governing the deliverability of your messages is the reputation of the Internet Protocol (IP) Address of your sending email server — its “IP Reputation.”

Here you can learn how to manage 8 factors that affect your server’s IP Reputation in order to maximize your reputation and increase the number of eyeballs that see your marketing email messages.

But first, you may want to check to see if you are on any common blacklists using mx toolbox.

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