About a month ago I finally got fed up with all the spam I was receiving. I had an account set up at litke.info to where all my email would forward (that I would then download to my home desktop system) and my email was going through a spam filter there, but it was proving to be inadequate. My email was also being forwarded to a Gmail account and since Gmail's spam filter was doing a much better job of sorting the spam out, I decided to reconfigure my litke.info account to only forward email to a new Gmail account.
The reconfiguration consisted mostly of creating a new Gmail account, making a forwarder and then deleting my litke.info account. A few months ago Gmail added a feater that would allow users to send email out through an SMTP server other than theirs. I had set up my account to send my email through my litke.info account. Well, after I deleted my litke.info account (back on Oct 15th) which was the account Gmail was sending my email through, none of the email I sent through my Gmail account was actually being sent.
Gmail did give me any indication that the emails were no longer going out. I finally figured out what was happening tonight. Danika mentioned something about an email we both received from my sister that I had responded to and she did not get the response. We did a bit more checking and discovered that she had not been receiving any of the messages I had sent to her from my Gmail account in the last month. I went to check the outgoing email settings and noticed it was set up to send outgoing messages through the litke.info account I had deleted. I sent up a new account at litke.info, reconfigured Gmail to send email through that account and now everything appears to be working again. I have say I am fairly surprised that there is no mechanism in Gmail to alert you when it can no longer send email out.