getReplyToAddress(post, newsletter) {
        const replyToAddress = newsletter.get('sender_reply_to');

        if (replyToAddress === 'support') {
            return this.#settingsHelpers.getMembersSupportAddress();
        }

        if (replyToAddress === 'newsletter' && !this.#emailAddressService.managedEmailEnabled) {
            return this.getFromAddress(post, newsletter);
        }

        const addresses = this.#emailAddressService.getAddress({
            from: this.#getRawFromAddress(post, newsletter),
            replyTo: replyToAddress === 'newsletter' ? undefined : {address: replyToAddress}
        });

        if (addresses.replyTo) {
            return EmailAddressParser.stringify(addresses.replyTo);
        }
        return null;
    }
@param {Post} post
@param {Newsletter} newsletter
@returns {string|null}