Okay, war tatsächlich smtp:
ZitatAlles anzeigen
Information:
error message: smtp error: 5.7.1 <forum@das-fanmagazin.de>: Sender address rejected: not owned by user info@das-fanmagazin.de (553)
error code: 17005
file: /www/sserv/sser6tz/html/forum/wcf/lib/data/mail/SMTPMailSender.class.php (147)
php version: 5.4.45-0+deb7u14
wcf version: 1.1.10 pl 2 (Tempest)
date: Wed, 16 Jan 2019 14:24:09 +0000
request: /forum/index.php?form=PostAdd&threadID=59315
referer: http://www.das-fanmagazin.de/f…rm=PostAdd&threadID=59315