Added ymail.com (Yahoo) domain to domains.csv (#382)

share/domains.csv

@@ -292,3 +292,4 @@ yandex.ua,imap.yandex.com,993,smtp.yandex.com,587
 zaclys.net,mail.zaclys.net,993,mail.zaclys.net,465
 zoho.com,imap.zoho.com,993,smtp.zoho.com,465
 zohomail.eu,imap.zoho.eu,993,smtp.zoho.eu,465
+ymail.com,imap.mail.yahoo.com,993,smtp.mail.yahoo.com,465