This feed does not validate.
line 1, column 1739: (20 occurrences) [help]
... -gmail/</guid><category>Gmail</category><og xmlns:og="http://ogp.me/ns#" ...
^
line 1, column 2214: (17 occurrences) [help]
... ns:author="http://www.w3.org/2005/Atom"><name>Chris Doan</name><title>Di ...
^
line 1, column 2237: (17 occurrences) [help]
... 3.org/2005/Atom"><name>Chris Doan</name><title>Director</title><departme ...
^
line 1, column 2260: (17 occurrences) [help]
... Chris Doan</name><title>Director</title><department>Gmail</department><c ...
^
line 1, column 2290: (17 occurrences) [help]
... or</title><department>Gmail</department><company/></author></item><item> ...
^
line 1, column 2300: (17 occurrences) [help]
... <department>Gmail</department><company/></author></item><item><title>Gma ...
^
In addition, interoperability with the widest range of feed readers could be improved by implementing the following recommendations.
... google/products/gmail/rss/" rel="self"/><language>en-us</language><lastB ...
^
... /images/Gmail.max-80x80.format-webp.webp</url><title>Gmail</title><link> ...
^
... 80x80.format-webp.webp</url><title>Gmail</title><link>https://blog.googl ...
^
line 1, column 1728: (20 occurrences) [help]
... tracking-in-gmail/</guid><category>Gmail</category><og xmlns:og="http:// ...
^