I have plesk droplet with roundcube webmail.
I receive emails, able to send but not reaching the destination:
connect to alt2.gmail-smtp-in.l.google.com[126.96.36.199]:25: Connection timed out
After days of investigation, this is like DO blocking email to be sent via port 25:
# telnet smtp.gmail.com 587 Trying 188.8.131.52... Connected to smtp.gmail.com. Escape character is '^]'. 220 smtp.gmail.com ESMTP o6sm557170wrs.11 - gsmtp quit 221 2.0.0 closing connection o6sm557170wrs.11 - gsmtp Connection closed by foreign host. # telnet smtp.gmail.com 25 Trying 184.108.40.206... ^X quit ^C
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