Here is a list of all places where b2evolution checks for potential spam users (by IP, domain, etc.) and may block them from performing the requested action:

• htsrv/comment_post.php

• htsrv/item_edit.php

• htsrv/login.php
  • activateaccount
  • validatemail

• htsrv/message_send.php

• htsrv/profile_update.php
  • upload_avatar

• htsrv/quick_upload.php

• htsrv/register.php
  • register

• inc/_core/_misc.funcs.php
  • send_mail

• inc/_init_login.inc.php

• inc/comments/_comments.ctrl.php
  • update
  • publish
  • restrict
  • deprecate
  • delete_url
  • update_publish
  • delete
  • elevate

• inc/files/files.ctrl.php
  • make_post

• inc/files/upload.ctrl.php

• inc/items/items.ctrl.php
  • update_edit
  • update
  • update_publish
  • publish
  • publish_now
  • restrict
  • deprecate
  • delete
  • create_edit
  • create
  • create_publish
  • make_posts_from_files

• inc/messaging/_messaging.init.php
  • create
  • messages

• inc/messaging/messages.ctrl.php
  • create

• inc/messaging/threads.ctrl.php
  • create

• htsrv/profile_update.php
  • upload_avatar

• inc/users/user.ctrl.php
  • upload_avatar