Email

Emails, or e-mails, were messages distributed by electronic means from one computer to another via a network, typically the Internet. (PROSE: )

On Earth, such technology was used as early as of the 2000s, (TV: ) and was still common as of 2040. (PROSE: )

History
In 1941, the Ninth Doctor told Rose Tyler that he was "email[ing] the upgrade" before he threw nanogenes to cure the Empty Child victims. (TV: )

In 2003, Gabrielle Graddige wrote an e-mail to the Brigadier soliciting his opinions on the "InterCom Affair", so that his thoughts could be incorporated into her book, War in Space - the Real Story. (PROSE: )

On his website Have you seen the Doctor????????, Clive Finch asked his readers to send photos, anecdotes, or top-secret documents to him via email or telephone number. On 5 March 2005, Rose Tyler contacted Clive and arranged to meet up with him at his home. (PROSE: )

After the defeat of the Slitheen family on 7 March 2006, Mickey Smith (TV: ) wrote on his website the morning after, confessing that he had "been in two minds" recently, finding himself doubting the evidence, facts, and secrets he uncovered, upon rewatching it, although he was reassured by the emails he received, even though he sometimes deleted them, knowing vaguely what was in them. (PROSE: )

By 2007, Ianto Jones's email address was iantojones@torchwood.co.uk. (AUDIO: )

In 2007, Elton Pope intended to keep in touch with Colin Skinner via email as he searched for Bridget Sinclair with Victor Kennedy. However, Elton found that Skinner had been absorbed by Victor soon after. (TV: )

During the Atraxi incident in 2008, email was one of the methods suggested by the Eleventh Doctor to Jeff Angelo to spread his computer virus across the world. (TV: )

In 2008, Vivien Rook designed an email to be automatically sent to Torchwood if she failed to return to her desk at 10:30pm. Jack Harkness later retrieved the message, finding it contained information on Harold Saxon's Archangel Network. (TV: )

In the 2000s, Jo Nakashima sent an email to Colonel Mace of UNIT concerning her investigations regarding a number of deaths related to ATMOS systems. (TV: )

In 2017, the Twelfth Doctor's sonic sunglasses could send and receive emails. A virtual version of the Doctor used this to send the real Doctor a recording of the Monks' simulation called Extremis. (TV: )

Undated events
Keri once received a spam email from Galaxy Five's Readers Digest. (PROSE: )

Emails were banned on Traken as they were too distracting. (AUDIO: )