int prepare_sockets(socket_controls* sockets, letter_info* info, int letter_count){

    int n = 0;
    for(size_t i = 0; i < letter_count; i++)
    {
        if(find_socket_by_name(sockets, n, info[i].to.host) < 0)
        {
            printf("Letters to send:\n");
            for(size_t i = 0; i < 1; i++)
            {
                printf("TO: %s@%s\n", info[i].to.user, info[i].to.host);
                printf("FROM: %s@%s\n", info[i].from.user, info[i].from.host);
                printf("PATH: %s\n\n", info[i].file_path);
            }
            sockets[n].name = strdup(info[i].to.host);

            printf("Letters to send2:\n");
            for(size_t i = 0; i < 1; i++)
            {
                printf("TO: %s@%s\n", info[i].to.user, info[i].to.host);
                printf("FROM: %s@%s\n", info[i].from.user, info[i].from.host);
                printf("PATH: %s\n\n", info[i].file_path);
            }
            char* ans = get_mxserver_name(info[i].to.host);
            printf("Letters to send3:\n");
            for(size_t i = 0; i < 1; i++)
            {
                printf("TO: %s@%s\n", info[i].to.user, info[i].to.host);
                printf("FROM: %s@%s\n", info[i].from.user, info[i].from.host);
                printf("PATH: %s\n\n", info[i].file_path);
            }
            struct addrinfo rrr =  get_first_addrinfo(ans, "25");
            int sd = socket(rrr.ai_family, rrr.ai_socktype, rrr.ai_protocol);
            if (sd < 0)
            {
                perror("socket() failed");
                break;
            }
            int on = 1;
            int rc = setsockopt(sd, SOL_SOCKET,  SO_REUSEADDR, (char *)&on, sizeof(on));
            if (rc < 0)
            {
                perror("setsockopt() failed");
                close(sd);
                exit(-1);
            }

            rc = ioctl(sd, FIONBIO, (char *)&on);
            if (rc < 0)
            {
                perror("ioctl() failed");
                close(sd);
                exit(-1);
            }

            rc = connect(sd, rrr.ai_addr, rrr.ai_addrlen);
            sockets[n].soket_dscr = sd;
            sockets[n].state = DEAD;
            sockets[i].next_event = 0;
            n++;
        }
    }
    printf("Letters to send AAAA:\n");
            for(size_t i = 0; i < letter_count; i++)
            {
                printf("TO: %s@%s\n", info[i].to.user, info[i].to.host);
                printf("FROM: %s@%s\n", info[i].from.user, info[i].from.host);
                printf("PATH: %s\n\n", info[i].file_path);
            }
   return 0;
}
--
int find_socket_by_name(socket_controls* sockets, int sockets_count, char* name){

    for(size_t i = 0; i < sockets_count; i++)
    {
        if(strcmp(name, sockets[i].name) == 0)
            return i;
    }
    return -1;
}


char * get_mxserver_name(const char *name){
    char *mxs[10];
    int a;
    a=resolvmx(name, mxs, 10);
    return mxs[a-1];
}
--
output:
Letters to send:
TO: das00@inbox.ru
FROM: ochko2@bmstu.ru
PATH: /home/a1/Documents/mail/inbox.ru/das00/new/letter02

Letters to send2:
TO: das00@inbox.ru
FROM: ochko2@bmstu.ru
PATH: /home/a1/Documents/mail/inbox.ru/das00/new/letter02

Letters to send3:
TO: das00@inbox.ru
FROM: ochko2@bmstu.ru
PATH: /home/a1/Documents/mail/inbox.ru/das00/new/letter02

Letters to send:
TO: das00@inbox.ru
FROM: ochko2@bmstu.ru
PATH: /home/a1/Documents/mail/inbox.ru/das00/new/letter02

Letters to send2:
TO: das00@inbox.ru
FROM: ochko2@bmstu.ru
PATH: /home/a1/Documents/mail/inbox.ru/das00/new/letter02

Letters to send3:
TO: das00@inbox.ru
FROM: ochko2@bmstu.ru
PATH: /home/a1/Documents/mail/inbox.ru/das00/new/letter02

Letters to send AAAA:
TO: das00@inbox.ru
FROM: ochko2@
PATH: /home/a1/Documents/mail/inbox.ru/das00/new/letter02

TO: das00@inbox.ru
FROM: ochko@bmstu.ru
PATH: /home/a1/Documents/mail/inbox.ru/das00/new/letter01

TO: awervolf@yandex.ru
FROM: ochko@bmstu.ru
PATH: /home/a1/Documents/mail/yandex.ru/awervolf/new/letter01