Can Send mail

Hello everyone,

In recent days, I receive my mail via Incredimail but when I want to send is the message I get:

Quote:

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501 Syntax error in parameters or arguments to EHLO command

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can someone tell me what it means and help me solve the problem?
In advance, thank you.

Have you checked the settings of your accounts, login, password, POP and SMTP.
Especially the SMTP protocol that is sending messages. (Simple Mail Transfer Protocol = Protocol Simple Mail Transfer)
Some ISPs (Internet Service Providers) authorizes the dispatch of mail through their SMTP and your ISP is Free rather than having you SMTP.
I guess you can still send mail from the mail server of your ISP or on its portal.

To clear the ground a bit
Since the ISP looks good
Has there been installing antivirus software?
Who would have little affect your output port should be the 25
Usually this setting is located in the option of setting
entry pop port 110
Exit "smtp" Port 25