Exceeding Max Email Address Sizes

Question

RFC Standard says the max email size is 320 (actually 256 according to http://www.dominicsayers.com/isemail/). Is there any conceivable scenario where email addresses could

Answer 1

Read this: http://www.eph.co.uk/resources/email-address-length-faq/ The upshot of it is that you should use 254 characters to store email addresses, because that is the maximum allowed in an SMTP transaction. This is specified in RFC5321 (your article says so, and is actually quoted in mine), which is authoritative.