E-mail phishing (short for "password fishing") is a widely used technique to acquire sensitive information of Internet users.

Phishers send fake e-mails to random e-mail distribution lists masquerading as well-known and trustworthy companies. The e-mails direct users to enter privileged login data at a website. These are fake websites which are similar in appearance to the websites of well-known providers.
The captured data is used to empty bank accounts or otherwise misuse private user accounts.
Some online car marketplaces were also used as alleged senders of phishing e-mails. Phishing targets included car dealers who were asked to disclose their login data.

Online car marketplaces will never ask for sensitive data in an e-mail. Access to the car ads is free and without obligation. You only disclose your data when registering with an online marketplace and using special services e.g. to run a search or to save a selection of vehicles – but this is done at the website and never by e-mail.

Unsolicited e-mails with attachments also involve potential risks: They might hide software (e.g. a virus/trojan) which manipulates the user’s own computer and gives third parties access to sensitive data. So never open such attachments.

Important: your Internet car marketplace will never send an unsolicited e-mail asking for login directly or using a link or sending attachments.