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  2. Mailbox providers & blocklists
  3. Mailbox providers

Mailbox providers

  • What is the difference between a B2B hosted mailbox and a B2B filtering company?

    Sending email campaigns to business addresses can be a very difference experience from sending to...

  • Apple deliverability best practices

    Service integration largely affects Apple Mail deliverability. For example, campaigns sent to a r...

  • Apple overview

    Apple, a U.S.-based mailbox provider (MBP), offers a free email service called iCloud Mail. iClou...

  • Country Overview: Russia

    Overview There are approximately 143 million people in Russia and, as of 2017, there are approxim...

  • Yandex troubleshooting support information

    Yandex troubleshooting support Make sure you follow sending best practices when sending to Yande...

  • Yandex deliverability best practices

    Yandex has fairly strict sending requirements in order for your email to reach the inbox. Followi...

  • Yandex overview

    Yandex is a mailbox and search engine provider based in Russia that has one of the most sophistic...

  • Mail.ru troubleshooting support information

    Mail.ru built most of its spam filter technology in-house and created its own proprietary bayesia...

  • Cox overview

    Cox Communications is a United States telecommunications provider with over 6 million customers. ...

  • Mail.ru deliverability best practices

    Having a good IP address and domain reputation is important to Mail.ru, so be sure to track your ...

  • EarthLink overview

    EarthLink is an Internet Service Provider (ISP) based in the United States with services includin...

  • Mail.ru overview

    The Russian webmail service, Mail.ru, was launched in 1998. With more than 100 million active ema...

  • Terra troubleshooting support

    Sending successfully to Terra and reaching the inbox is highly dependent on your sending reputati...

  • Terra deliverability best practices

    Sending successfully to Terra and reaching the inbox is highly dependent on your sending reputati...

  • Terra overview

    Terra Networks, S.A. (Terra) is a Spanish Internet multinational company with headquarters in Spa...

  • Free troubleshooting support information

    Free provides a postmaster website support page to help senders encountering delivery problems to...

  • Free deliverability best practices

    Free cares about your sending reputation as well as respecting their resources when making filter...

  • Free overview

    Free is one of the largest telecommunication companies in France and is a subsidiary of Iliad SA....

  • Rackspace overview

    Rackspace Technology is a cloud services and hosting solutions provider with over 140000 customer...

  • Orange troubleshooting support information

    Orange’s approach to fighting spam includes filtering on both the reputation of the sender and em...

  • Orange deliverability best practices

    Orange has strict consent rules that must be followed in order to send successfully to their cust...

  • Orange overview

    Orange (formerly France Telecom S.A.) is a global telecommunications company headquartered in Par...

  • Verizon deliverability best practices and troubleshooting support

    Verizon acquired AOL (2015) and Yahoo! (2017) and successfully merged email infrastructures in 20...

  • Verizon overview

    Verizon acquired AOL (2015) and Yahoo! (2017) and successfully merged email infrastructures in 20...

  • BT Mail overview

    BT is one of the world's largest providers of telecommunications services and solutions, with ope...

  • Time Warner Cable (Road Runner) troubleshooting support information

    TWC uses Cloudmark that factors in customer complaints, IP sending reputation and content in filt...

  • Time Warner Cable (Road Runner) deliverability best practices

    Time Warner Cable’s (TWC) goal for their email service is to ensure their customers receive email...

  • Time Warner Cable (Road Runner) overview

      Road Runner High Speed Online started in 1995 under the Time Warner Cable (TWC) company umbrell...

  • AT&T, Bellsouth and SBC troubleshooting support information

    Although AT&T uses the Verizon Media (AOL & Yahoo!) infrastructure, once email makes it through t...

  • AT&T, Bellsouth and SBC deliverability best practices

    AT&T, Bellsouth, and SBC use the Verizon Media (AOL & Yahoo!) email infrastructure to filter mess...

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