Does every site use the same port for SMTP?

1

My question is whether every website uses the same port for smtp? It’s about Hydra

2

Usually an outgoing server employs port 25.
You can also use port 587 or port 465 to avoid spamblocks.
port 587 is supported by almost every outgoing SMTP server and it’s useful for unencrypted or TLS connections; while port 465 is the right choice if you need to connect via SSL.

3

Port 25 is the original standard SMTP port. Port 465 should not be used unless absolutely necessary. Port 587 is the best choice for SparkPost and modern apps whereas 2525 is alternative, non-standard SMTP port and could be an alternative in cases when standard ports aren’t available.