ntfy attachments don't work

[variasdesign]

Hello.

I'm trying to send an attachment to ntfy through mailrise. I'm using mailsend:

mailsend -smtp mailrise.xyz -t [email protected] -attach "/var/log/system.log" -sub "System log" -f [email protected] -M "Here's the system log:"

However, the delivery fails:

[2024-01-26 17:33:01] WARNING:mailrise.skeleton:Notification failed: address: [ [email protected] ➤ [email protected] ] subject: [ System log ] body: [ Here's the system (0.0K) ] attach: [ system.log (1536.8K) ]

If I remove the attachment, everything works as expected. AFAIK, Apprise supports attachments in ntfy notifications. What could be wrong? Thanks for any help.