what ports do email clients use????

do email clients use just ports 25 and 110??? or do they use others as well???

because when i have my server firewall running, and enable access to port 25 and 110 email clients are still not able to connect, getting a connection refused error.

when i stop the firewall, clients connect fine

so are there any other ports i need open, or does anyone know a reason why this is happening

thanx

 

 

 

 

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