fix(smtp): use "ehlo.thunderbird.net" as EHLO hostname

import java.io.BufferedOutputStream

import java.io.IOException

import java.io.OutputStream

import java.net.Inet6Address

import java.net.InetAddress

import java.net.InetSocketAddress

import java.net.Socket

            readGreeting()

            val helloName = buildHostnameToReport()

            // We use "ehlo.thunderbird.net" for privacy reasons,

            // see https://ehlo.thunderbird.net/

            val helloName = "ehlo.thunderbird.net"

            var extensions = sendHello(helloName)

            is8bitEncodingAllowed = extensions.containsKey("8BITMIME")

        }

    }

    private fun buildHostnameToReport(): String {

        val localAddress = socket!!.localAddress

        // We use local IP statically for privacy reasons,

        // see https://github.com/thunderbird/thunderbird-android/pull/3798

        return if (localAddress is Inet6Address) {

            "[IPv6:::1]"

        } else {

            "[127.0.0.1]"

        }

    }

    private fun parseOptionalSizeValue(sizeParameters: List<String>?) {

        if (sizeParameters != null && sizeParameters.isNotEmpty()) {

            val sizeParameter = sizeParameters.first()