no email sent with static IP (with dyn local IP fine though)

[dsyleixa]

no email sent with static IP, although connection established (different local IPs tested);
but with dynamic IP ok:
(Arduino IDE 1.8.5, board: NodeMCU 1.0)

IPAddress this_ip(192, 168, 2, 200); // this_ip(192, 168, 2, 201); this_ip(192, 168, 2, 222);
IPAddress gateway(192, 168, 2, 1); // <<< LAN Gateway IP
IPAddress subnet(255, 255, 255, 0); // <<< LAN Subnet Mask

WiFi.begin(ssid, password);
//WiFi.config(this_ip, gateway, subnet); // <<< static IP, uncommented: no email sent;
// dyn IP, outcommented: email send works

#include <ESP8266WiFi.h>
#include "Gsender.h"

#pragma region Globals
const char* ssid = "dlink-4212";                           // WIFI network name
const char* password = "nhyyi53680";    // WIFI network password
uint8_t connection_state = 0;                    // Connected to WIFI or not
uint16_t reconnect_interval = 10000;             // If not connected wait time to try again
#pragma endregion Globals

uint8_t WiFiConnect(const char* nSSID = nullptr, const char* nPassword = nullptr)
{
    IPAddress    this_ip(192, 168, 2, 222);
    IPAddress    gateway(192, 168, 2, 1);       // <<< LAN Gateway IP
    IPAddress    subnet(255, 255, 255, 0);      // <<< LAN Subnet Mask
    
    static uint16_t attempt = 0;
    Serial.print("Connecting to ");
    /*
    if(nSSID) {
        WiFi.begin(nSSID, nPassword);  
        Serial.println(nSSID);
    } else */
    {    
        WiFi.begin(ssid, password);
        //WiFi.config(this_ip, gateway, subnet);   // <<< uncommented: no email sent; 
                                                   //     outcommented: emailsend works
        delay(500);
        Serial.println(ssid);
    }

    uint8_t i = 0;
    while(WiFi.status()!= WL_CONNECTED && i++ < 50)
    {
        delay(200);
        Serial.print(".");
    }
    ++attempt;
    Serial.println("");
    if(i == 51) {
        Serial.print("Connection: TIMEOUT on attempt: ");
        Serial.println(attempt);
        if(attempt % 2 == 0)
            Serial.println("Check if access point available or SSID and Password\r\n");
        return false;
    }
    Serial.println("Connection: ESTABLISHED");
    Serial.print("Got IP address: ");
    Serial.println(WiFi.localIP());
    return true;
}

void Awaits()
{
    uint32_t ts = millis();
    while(!connection_state)
    {
        delay(50);
        if(millis() > (ts + reconnect_interval) && !connection_state){
            connection_state = WiFiConnect();
            ts = millis();
        }
    }
}

void setup()
{
    Serial.begin(115200);
    delay(500);
    Serial.println("starting...");
    connection_state = WiFiConnect();
    if(!connection_state)  // if not connected to WIFI
        Awaits();          // constantly trying to connect

    Gsender *gsender = Gsender::Instance();    // Getting pointer to class instance
    String subject = "Subject is optional!";
    if(gsender->Subject(subject)->Send("abcde@gmail.com", "Setup test")) { // <<< send email
        Serial.println("Message send.");
    } else {
        Serial.print("Error sending message: ");
        Serial.println(gsender->getError());
    }
}

void loop(){}

[dsyleixa]

is this repo still maintained?