laffit i think every temp mail site works but mostly i use this- https://tempmailo.com/
but i don’t use the trial in temp mail created account, what i do is whwn my main account trial ends i delete the account and claim a trial on tempmail account after that i just change the email id in profile of that account with my main email address , now when i login with my main account i have the free trail again on it but cuz i deleted that account before so i have to re deploy my code. if you ask why i directly not use that tempmail railway account than it simply cuz thats a temp mail, if in future i lost access to that email i would not able to login railway on railway.com site.
