if(string_is_address(addr->mailbox, Username, mutt_fqdn(1)))
if (string_is_address(addr->mailbox, Username, mutt_fqdn(1))) return 1;  if (From && !mutt_strcasecmp (From->mailbox, addr->mailbox))
int mutt_addr_is_user (ADDRESS *addr){  /* NULL address is assumed to be the user. */  if (!addr)    return 1;  if (!addr->mailbox)    return 0;  if (mutt_strcasecmp (addr->mailbox, Username) == 0)    return 1;  if(string_is_address(addr->mailbox, Username, Hostname))    return 1;  if(string_is_address(addr->mailbox, Username, mutt_fqdn(0)))    return 1;  if(string_is_address(addr->mailbox, Username, mutt_fqdn(1)))    return 1;  if (Alternates.pattern &&      regexec (Alternates.rx, addr->mailbox, 0, NULL, 0) == 0)    return 1;    return 0;}