addOutgoingServer method
Adds the outgoing server.
Implementation
void addOutgoingServer(ServerConfig server) {
outgoingServers ??= <ServerConfig>[];
outgoingServers?.add(server);
preferredOutgoingServer ??= server;
if (server.type == ServerType.smtp && preferredOutgoingSmtpServer == null) {
preferredOutgoingSmtpServer = server;
}
}