deno function - smtp - works locally but fails remote

TimedOut: Connection timed out (os error 110)
    at async Object.connect (deno:ext/net/01_net.js:333:17)
    at async SmtpClient.connect (file:///src/main.ts:857:22)
    at async Server.<anonymous> (file:///src/main.ts:1173:5)
    at async Server.#respond (file:///src/main.ts:111:24)
Severity
ERROR
Deployment version3
Timestamp16 Oct, 2022 09:41
Execution ID43ccbd3e-63eb-43bb-9ab6-06f58bc38ea0

    await smtp.connect({
        hostname: String(Deno.env.get('SENDGRID_SMTP_HOSTNAME')),
        port: Number(Deno.env.get('SENDGRID_SMTP_PORT')),
        username: String(Deno.env.get('SENDGRID_SMTP_USERNAME')),
        password: String(Deno.env.get('SENDGRID_SMTP_PASSWORD')),
    });

    try {
        await smtp.send({
            from: String(Deno.env.get('SENDGRID_SMTP_FROM')),
            to: payload.to,
            subject: payload.subject,
            content: payload.content,
        });
    } catch (error) {
        return new Response(error.message, { status: 500 });
    }

    await smtp.close();