If implemented correctly, email blasting is the most powerful and has the highest ROI among all marketing channels. The first thing to do before you send out your email campaign is to select a healthy SMTP server to deliver emails. If you made a wrong move at this step, you would be risking your capital and the reputation of your company.

There are usually three types of email SMTP servers you can choose:

1. Partner Email SMTP Servers

These email service providers (e.g. Gmail, Yahoo! Mail, Hotmail, AOL Mail, etc.) sign agreements that emails from each other's server will never be blocked and there is no limitation on the number of emails sent per day. The only limitation imposed is on the content of the email. Therefore, as long as you avoid using those spam keywords in your email, and do not send mass emails too fast, most of your emails will be delivered safely and accurately. By utilizing professional email marketing software, like 1and1Mail, you can get your job done very easily.

1and1Mail SMTP Server Setting

2. Email SMTP servers with healthy records

To ensure a SMTP server has a healthy record, there are three things to check. (1) The servers have fixed IPs and they are not in the blacklist of international anti-spam association. (2) The Reverse PTR Records are set correctly. (3) The settings on the SMTP servers are correct. Again, as long as you write good contents and control the speed of sending well with 1and1Mail, your IPs will not be blocked.

3. Unknown Email SMTP servers

These servers usually use dynamic IPs, do not have a correct DNS records or reverse PTR records, or are blacklisted by many well-known email service providers. Emails sent from these servers would be easily blocked or go into junk mail box.

To conclude, do some research on the email SMTP servers you are using. Moreover, do not be too aggressive when sending mass emails. Use them properly with professional email blasters to build up reputation of your domain and email account.

In 1and1Mail 3.2, we are going to launch a new feature called "Auto IP Switcher" that can change your IP address automatically when you are sending your mass email campaigns. Why do you need it? How does it work?

1. Why do you need "Auto IP Switcher" in your email marketing software?

"Auto IP Switcher" can help us send more emails using free email accounts, such as Gmail, Hotmail, Yahoo! Mail and AOL Mail. But if you are using your corporate email accounts or paid email accounts, most likely you do not need this feature.

As we know, nowadays, most free email service providers have become very strict with mass mailing behaviors. None of them would like to become a victim of spammers. Therefore, they limit the daily sending limit of free email accounts in two ways:

(1) Daily quota of a single email account

On average, a single email account can send out 100 – 500 emails per day, depending on your account reputation with the service provider. To play safe, do not go over 100 per account per day, otherwise, your email account will be suspended soon. So, can I sign up multiple email accounts and send 100 × n emails per day? It depends on the following.

(2) Daily quota of multiple email accounts from a single IP address

To prevent you from sending mass mails by applying multiple email accounts, the service provider also sets a daily limit on number of emails from a single IP address. This is a very smart move because in most cases, one PC only has one IP over a certain period of time. It is difficult to send more emails with multiple email accounts under a single IP address.
 

2. How to get a new IP address to increase email deliverability?

The traditional way is: manually disconnect your Internet connection, and redial to reconnect.

In most cases, after you disconnect and redial, your PC  will be assigned a new IP address unless

(1) You connect to the Internet through a static IP.

(2) You connect to the Internet through a router. (You need to restart the router to get a new IP.)

(3) You connect to the Internet through the local network of your company or your school.
 

3. How to switch IP automatically in 1and1Mail?

To maximize the email deliverability, 1and1Mail uses a special way to do the IP switching. In 1and1Mail Personal Edition and Business Edition, you are allowed to add multiple email accounts from different email service providers, and also divide them into groups. 1and1Mail will change IP automatically based on groups, not based on a fixed time interval. Please follow the 3 steps as below:

Auto IP Switcher

(1) Enter your username and password in Redial Setting for Auto IP Switcher. (Tools -> Settings -> Auto IP Switcher)

(2) When you start the sending, 1and1Mail will select a certain number of email accounts from the same ESP (email service provider). For example, 2 email accounts from Gmail, 2 email accounts from Hotmail, 2 email accounts from Yahoo! Mail, 2 email accounts from AOL Mail. Since each of them are from different ESPs, it can fully take advantage of the power of a single IP address.

(3) 1and1Mail send mass emails out using the email addresses in Step 2 by turns. For example, send 20 emails through each email address. After it is finished, 1and1Mail automatically disconnect the Internet and redial to get a new IP, and then continue the sending through another group of new email addresses again.

1and1Mail 3.2 will be launched in Nov 2011. You can download the Free Edition it from here. But since 1and1Mail Free Edition only allows 1 email account, the Auto IP Switcher only makes sense in Personal and Business Edition.

 

Some email marketers may encounter IP banning when sending mass emails through 1and1Mail. Whether or not your IP will be blocked depends on the following things:

1. If you are using your company email accounts or paid email accounts to send mass mails, your email service provider will simply suspend your email account or SMTP connection. Your IP is safe in this case.

2. If you are using free email accounts from Gmail, Yahoo! Mail, or Hotmail, and using dynamic IP through dail-up. Your IP will be temporarily suspended, but it will be resumed soon, because the IP will be assigned to someone else next time.

3. If you are doing mass mailing through a static IP, it is very likely your IP will be suspended until you contact your ISP and explain the reason.

In 1and1Mail 3.2 (to be released at the end of Oct), the Auto IP Switcher feature can help avoid the above situations as much as possible and increase your email deliverability.


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