Below you find my Email addresses and other options to get in contact with me. Most of the time I prefer asynchronous communication. Therefore I recommend to send an Email unless it is really time critical.
email@example.com, if you want to talk about Free Software and my work at FSFE.
firstname.lastname@example.org, if you want to talk about Nextcloud.
email@example.com, for everything else.
@bjoern:schiessle.org, if it is not time critical please consider writing a Email instead.