开云体育

Alan,

Below is a request to join. Note that is from an AOL address and
sent to groups.io. ...
-----Original Message-----
From: MAILER-DAEMON <MAILER-DAEMON@...

It could be because Verizon bought both AOL and Yahoo. They may be merging those systems.

Glad you found the actual problem though.

In the past when facing this kind of mystery I've resorted to pasting the two addresses into Notepad, one above the other on adjacent lines, to compare them letter by letter. Notepad defaults to a fixed-pitch font which makes it a lot easier to see differences involving thin letters like i and l.

Shal


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