If you have not explored the options available on the e-mail client, you should attempt it. Increasing the font size for older Interneters who may have difficulty reading small typefaces makes sense. Keeping directory information current reduces frustration in sending e-mail. People using older versions of e-mail products my find benefits in upgrading to a newer model. Because e-mail holds such popularity, easy to use, glitch free software reduces frustration and headaches.
Techniques Never open file attachments from strangers.
In fact, my policy is to scan all file attachments before opening regardless of the source. Although rare, close friends and relatives can transmit a virus via an e-mail attachment. When making software changes, send test messages to personal accounts. Most free e-mail providers will close accounts without activity. Periodic 'this is a test' messages to low activity accounts assures availability for 'stand by' addresses.