Echo mailer
An echo mailer or mail echo is a function of individual mail servers , each of which sends a copy of the incoming e-mails for a specific address back to the sender in order to enable the sender to check it.
The sender usually receives the e-mail back in such a way that he can understand how it was received by the recipient. For example, he can see the changes made to the header by Mail Transfer Agents .
The specialty of the mail echo is that the traditional function of the bounce , which should inform about invalid addresses, is still used, but not as an error message. Because sender addresses cannot be verified, mail servers usually no longer respond automatically.
Well-known e-mail addresses from echo mailers
- mailback@bsc-computer.de (service works reliably, but long response times (approx. 15 min.) due to greylisting ; as of June 27, 2019)
- echo@robert-online.com (service works reliably; as of April 4, 2019)
- nicoo@nicoo.org (service probably discontinued; as of January 3, 2020)
- echo@tu-chemnitz.de (service works reliably, but long response times (approx. 15 min.) thanks to greylisting ; as of March 26, 2019)
- ping@stamper.itconsult.co.uk (service works reliably; as of March 26, 2019)
- echo@univie.ac.at (service works reliably; as of March 26, 2019)
- echo@kristallnet.net (works; as of March 26, 2019)
- mail-robot@grossing.de (service works reliably, but long response times (approx. 15 min.) thanks to greylisting ; as of November 22, 2016)
- echo@datevnet.de (service works reliably, but long response times (approx. 6 min.); as of March 26, 2019)
- echo@echo.skoopsmedia.net (service probably discontinued; as of November 22, 2016)
- test@mega.bw (service probably closed; as of November 23, 2016)
- test@mastertools.ch (service probably discontinued; as of January 4, 2018)
- echo@ip-plus.net (service probably discontinued; as of November 22, 2016)
- echo@tu-berlin.de (service discontinued; as of January 2, 2018)