I just tried to compile package imap-2004g_suse-4 with the Intel C compiler.

It said

1.

env_unix.c(1206): warning #187: use of "=" where "==" may have been intended

The source code is

          (read (fd,tmp,i) == i) && !(tmp[i] = 0) && ((i = atol (tmp)) > 0))

I agree with the compiler. Suggest new code

          (read (fd,tmp,i) == i) && !(tmp[i] == 0) && ((i = atol (tmp)) > 0))

2.

imap4r1.c(1814): warning #187: use of "=" where "==" may have been intended

The source code is

          (aflg.text = "-FLAGS \\Seen")) ||

I agree with the compiler. May new code

          (aflg.text == "-FLAGS \\Seen")) ||

or maybe 

          (strcmp( aflg.text, "-FLAGS \\Seen") == 0)) ||

would be better

3.

imap4r1.c(1816): warning #187: use of "=" where "==" may have been intended

Duplicate.

4.

nntp.c(848): warning #187: use of "=" where "==" may have been intended

The source code is

      if ((elt = mail_elt (stream,i))->sequence && (elt->valid = T) &&

I agree with the compiler. Suggest new code

      if ((elt = mail_elt (stream,i))->sequence && (elt->valid == T) &&