does there have to be a return address on an envelope
Return address The return address is not required on postal mail. However, lack of a return address prevents the postal service from being able to return the item if it proves undeliverable; such as from damage, postage due, or invalid destination. Such mail may otherwise become dead letter mail.[2]
Email Messages are exchanged between hosts using the Simple Mail Transfer Protocol with software programs called mail transfer agents (MTAs); and delivered to a mail store by programs called mail delivery agents (MDAs, also sometimes called local delivery agents, LDAs). Accepting a message obliges an MTA to deliver it,[56] and when a message cannot be delivered, that MTA must send a bounce message back to the sender, indicating the problem.
My Ántonia
Extradition Act 2003 Albania, Algeria, Andorra, Antigua and Barbuda, Argentina, Armenia, Australia, Azerbaijan, The Bahamas, Bangladesh, Barbados, Belize, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, Brunei, Canada, Chile, Colombia, Cook Islands, Cuba, Dominica, Ecuador, El Salvador, Fiji, The Gambia, Georgia, Ghana, Grenada, Guatemala, Guyana, Hong Kong Special Administrative Region, Haiti, Iceland, India, Iraq, Israel, Jamaica, Kenya, Kiribati, Lesotho, Liberia, Libya, Liechtenstein, Macedonia, Malawi, Malaysia, Maldives, Mauritius, Mexico, Moldova, Monaco, Montenegro, Nauru, New Zealand, Nicaragua, Nigeria, Norway, Panama, Papua New Guinea, Paraguay, Phillipines, Peru, The Republic of Korea, Russian Federation, Saint Christopher and Nevis, Saint Lucia, Saint Vincent and the Grenadines, San Marino, Serbia, Seychelles, Sierra Leone, Singapore, Solomon Islands, South Africa, Sri Lanka, Swaziland, Switzerland, Tanzania, Thailand, Tonga, Trinidad and Tobago, Turkey, Tuvalu, Uganda, Ukraine, United Arab Emirates, Uruguay, USA, Vanuatu, Western Samoa, Zambia, Zimbabwe [7][8]