I have the same issue. I am using Mac Mail set to use the server mail.me.com and I am using my .me account. Have tried all variation on settings and get nowhere. Apparently randomly emails will not go. The same email in Postbox or using my mobile me web account is fine.I hope someone can sort this. What is the point in a mail account that can't send mail?
Chalk up another one that cannot send mail. I can receive it fine, can't reply or send new mail. This has been ongoing for about 2 weeks now. I am using Mac Mail with 2 AOL accounts and 1 gmail account. None of them will send.
Is it possible some sort of virus or trojan is causing this? I get lot's of spam but never open them.
I'm having the same issue! A mac mail account and 2 POP accounts refuse to send or reply to emails. I know that the accounts are fine since they send just fine from my iPhone and from anything other then Mac mail. This is obviously driving me crazy!