not able to send attachments

i’m newbie to this forum, had configured zpush on centos 7, emails with attachments are not going out from outbox, even its 1 kb attachment.

hi @1san,
to help you, we need some more informations.
Which OS, Which Kopano Version, which z-push version and of course the checked logfiles - if there any errors occured (-:

i was using centos with z-push 2.3.9, now its resolved after upgrading to 2.4.2, may be i had not configured some of config files properly