SnappyMail ERROR: Can't send message

I am trying to send a test email, but I am getting this

Can’t send message in red

and here are the email logs

Feb  9 08:33:04 localhost dovecot: imap-login: Login: user=<support@aianime.co>, method=PLAIN, rip=::1, lip=::1, mpid=38072, TLS, session=<ecu6OkD0GoEAAAAAAAAAAAAAAAAAAAAB>
Feb  9 08:33:04 localhost postfix/submission/smtpd[38050]: connect from localhost[::1]
Feb  9 08:33:04 localhost postfix/submission/smtpd[38050]: TLS SNI localhost from localhost[::1] not matched, using default chain
Feb  9 08:33:04 localhost postfix/submission/smtpd[38050]: NOQUEUE: reject: RCPT from localhost[::1]: 554 5.7.1 <dubspayme@gmail.com>: Recipient address rejected: Access denied; from=<support@aianime.co> to=<dubspayme@gmail.com> proto=ESMTP helo=<aianime.co>
Feb  9 08:33:04 localhost postfix/submission/smtpd[38050]: using backwards-compatible default setting smtpd_relay_before_recipient_restrictions=no to reject recipient "dubspayme@gmail.com" from client "localhost[::1]"
Feb  9 08:33:04 localhost postfix/submission/smtpd[38050]: disconnect from localhost[::1] ehlo=2 starttls=1 mail=1 rcpt=0/1 quit=1 commands=5/6
Feb  9 08:33:04 localhost dovecot: imap(support@aianime.co)<38072><ecu6OkD0GoEAAAAAAAAAAAAAAAAAAAAB>: Disconnected: Logged out in=11 out=491 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
Feb  9 08:33:04 localhost dovecot: imap-login: Login: user=<support@aianime.co>, method=PLAIN, rip=::1, lip=::1, mpid=38074, TLS, session=<1vXBOkD0JIEAAAAAAAAAAAAAAAAAAAAB>
Feb  9 08:33:04 localhost dovecot: imap(support@aianime.co)<38074><1vXBOkD0JIEAAAAAAAAAAAAAAAAAAAAB>: Disconnected: Logged out in=91 out=633 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0

Helo @dieselino0

Check if your smtp/smtps ports are blocked by the firewall or service provider

I’m also facing the same error. My ports are all open. Please what could be wrong?

I’ve solved this by using “Issue mail server ssl” option